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Abstract
A phase transition occurs when correlated regions of a new phase grow to span the system and the fluctuations within the correlated regions become long lived. Here, we present neutron scattering measurements showing that this conventional picture must be replaced in YFe2Al10, a compound that forms naturally very close to a [Formula: see text] quantum phase transition. Fully quantum mechanical fluctuations of localized moments are found to diverge at low energies and temperatures; however, the fluctuating moments are entirely without spatial correlations. Zero temperature order in YFe2Al10 is achieved by an entirely local type of quantum phase transition that may originate with the creation of the moments themselves.
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Varma CM. Quantum-critical fluctuations in 2D metals: strange metals and superconductivity in antiferromagnets and in cuprates. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2016; 79:082501. [PMID: 27411298 DOI: 10.1088/0034-4885/79/8/082501] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The anomalous transport and thermodynamic properties in the quantum-critical region, in the cuprates, and in the quasi-two dimensional Fe-based superconductors and heavy-fermion compounds, have the same temperature dependences. This can occur only if, despite their vast microscopic differences, a common statistical mechanical model describes their phase transitions. The antiferromagnetic (AFM)-ic models for the latter two, just as the loop-current model for the cuprates, map to the dissipative XY model. The solution of this model in (2+1)D reveals that the critical fluctuations are determined by topological excitations, vortices and a variety of instantons, and not by renormalized spin-wave theories of the Landau-Ginzburg-Wilson type, adapted by Moriya, Hertz and others for quantum-criticality. The absorptive part of the fluctuations is a separable function of momentum [Formula: see text], measured from the ordering vector, and of the frequency ω and the temperature T which scale as [Formula: see text] at criticality. Direct measurements of the fluctuations by neutron scattering in the quasi-two-dimensional heavy fermion and Fe-based compounds, near their antiferromagnetic quantum critical point, are consistent with this form. Such fluctuations, together with the vertex coupling them to fermions, lead to a marginal fermi-liquid, with the imaginary part of the self-energy [Formula: see text] for all momenta, a resistivity [Formula: see text], a [Formula: see text] contribution to the specific heat, and other singular fermi-liquid properties common to these diverse compounds, as well as to d-wave superconductivity. This is explicitly verified, in the cuprates, by analysis of the pairing and the normal self-energy directly extracted from the recent high resolution angle resolved photoemission measurements. This reveals, in agreement with the theory, that the frequency dependence of the attractive irreducible particle-particle vertex in the d-wave channel is the same as the irreducible particle-hole vertex in the full symmetry of the lattice.
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Affiliation(s)
- Chandra M Varma
- Department of Physics and Astronomy, University of California, Riverside, CA 92521, USA
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3
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Varma CM. Quantum Criticality in Quasi-Two-Dimensional Itinerant Antiferromagnets. PHYSICAL REVIEW LETTERS 2015; 115:186405. [PMID: 26565482 DOI: 10.1103/physrevlett.115.186405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Indexed: 06/05/2023]
Abstract
Quasi-two-dimensional itinerant fermions in the antiferromagnetic (AFM) quantum-critical region of their phase diagram, such as in the Fe-based superconductors or in some of the heavy-fermion compounds, exhibit a resistivity varying linearly with temperature and a contribution to specific heat or thermopower proportional to TlnT. It is shown, here, that a generic model of itinerant anti-ferromagnet can be canonically transformed so that its critical fluctuations around the AFM-vector Q can be obtained from the fluctuations in the long wavelength limit of a dissipative quantum XY model. The fluctuations of the dissipative quantum XY model in 2D have been evaluated recently, and in a large regime of parameters, they are determined, not by renormalized spin fluctuations, but by topological excitations. In this regime, the fluctuations are separable in their spatial and temporal dependence and have a spatial correlation length which is proportional to the logarithm of the temporal correlation length, i.e., for some purposes, the effective dynamic exponent z=∞. The time dependence gives ω/T scaling at criticality. The observed resistivity and entropy then follow. Several predictions to test the theory are also given.
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Affiliation(s)
- C M Varma
- Department of Physics and Astronomy, University of California, Riverside, California 92521, USA
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Calder S, Giblin SR, Parker DR, Deen PP, Ritter C, Stewart JR, Rols S, Fennell T. Neutron scattering and μSR investigations of the low temperature state of LuCuGaO₄. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2013; 25:356002. [PMID: 23917326 DOI: 10.1088/0953-8984/25/35/356002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
LuCuGaO₄ has magnetic Cu(2+) and diamagnetic Ga(3+) ions distributed on a triangular bilayer and is suggested to undergo a spin glass transition at Tg ∼ 0.4 K. Using μSR (muon spin rotation) and neutron scattering measurements, we show that at low temperature the spins form a short range correlated state with spin fluctuations detectable over a wide range of timescales: at 0.05 K magnetic fluctuations can be detected in both the μSR time window and also extending beyond 7 meV in the inelastic neutron scattering response, indicating magnetic fluctuations spanning timescales between ∼10(-5) and ∼10(-10) s. The dynamical susceptibility scales according to the form χ″(ω)T(α), with α = 1, throughout the measured temperature range (0.05-50 K). These effects are associated with quantum fluctuations and some degree of structural disorder in ostensibly quite different materials, including certain heavy fermion alloys, kagome spin liquids, quantum spin glasses, and valence bond glasses. We therefore suggest that LuCuGaO₄ is an interesting model compound for the further examination of disorder and quantum magnetism.
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Affiliation(s)
- S Calder
- Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
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5
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Helton JS, Matan K, Shores MP, Nytko EA, Bartlett BM, Qiu Y, Nocera DG, Lee YS. Dynamic scaling in the susceptibility of the spin-1/2 kagome lattice antiferromagnet herbertsmithite. PHYSICAL REVIEW LETTERS 2010; 104:147201. [PMID: 20481955 DOI: 10.1103/physrevlett.104.147201] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2010] [Revised: 03/11/2010] [Indexed: 05/29/2023]
Abstract
The spin-1/2 kagome lattice antiferromagnet herbertsmithite, ZnCu(3)(OH)(6)Cl(2), is a candidate material for a quantum spin liquid ground state. We show that the magnetic response of this material displays an unusual scaling relation in both the bulk ac susceptibility and the low energy dynamic susceptibility as measured by inelastic neutron scattering. The quantity chiT(alpha) with alpha approximately 0.66 can be expressed as a universal function of H/T or omega/T. This scaling is discussed in relation to similar behavior seen in systems influenced by disorder or by the proximity to a quantum critical point.
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Affiliation(s)
- J S Helton
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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6
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de Vries MA, Stewart JR, Deen PP, Piatek JO, Nilsen GJ, Rønnow HM, Harrison A. Scale-free antiferromagnetic fluctuations in the s = 1/2 kagome antiferromagnet herbertsmithite. PHYSICAL REVIEW LETTERS 2009; 103:237201. [PMID: 20366167 DOI: 10.1103/physrevlett.103.237201] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2009] [Revised: 10/12/2009] [Indexed: 05/29/2023]
Abstract
Neutron spectroscopy and diffuse neutron scattering on herbertsmithite [ZnCu(3)(OH)(6)Cl(2)], a near-ideal realization of the s=1/2 kagome antiferromagnet, reveal the hallmark property of a quantum spin liquid: instantaneous short-ranged antiferromagnetic correlations in the absence of a time-averaged ordered moment. These dynamic antiferromagnetic correlations are weakly dependent of neutron-energy transfer and temperature, and persist up to 25 meV and 120 K. At low energy transfers a shift of the magnetic scattering to low Q is observed with increasing temperature, providing evidence of gapless spinons. It is argued that these observations provide important evidence in favor of resonating-valence-bond theories of (doped) Mott insulators.
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Affiliation(s)
- M A de Vries
- School of Physics & Astronomy, University of St-Andrews, the North Haugh, St Andrews, KY16 9SS, United Kingdom.
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7
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Lipscombe OJ, Vignolle B, Perring TG, Frost CD, Hayden SM. Emergence of coherent magnetic excitations in the high temperature underdoped La2-xSrxCuO4 superconductor at low temperatures. PHYSICAL REVIEW LETTERS 2009; 102:167002. [PMID: 19518745 DOI: 10.1103/physrevlett.102.167002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2008] [Indexed: 05/27/2023]
Abstract
We use inelastic neutron scattering to measure the magnetic excitations in underdoped La2-xSrxCuO4 (x=0.085, T_{c}=22 K) for large energy (5<E<200 meV) and temperature (5<T<300 K) ranges. At low T, the response is highly structured in E and q, with peaks in the local susceptibility at 15 and 50 meV and a four-peaked structure in q for E approximately 185 meV. Raising T from 30 K greater, similarT_{c} to 300 K causes the structure in chi;{''}(q,omega) present for E<70 meV to disappear. It is replaced with a strongly damped response. We attribute this change to the disappearance of the pseudogap with increasing temperature.
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Affiliation(s)
- O J Lipscombe
- H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, United Kingdom
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8
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Lake B, Tennant DA, Frost CD, Nagler SE. Quantum criticality and universal scaling of a quantum antiferromagnet. NATURE MATERIALS 2005; 4:329-334. [PMID: 15778717 DOI: 10.1038/nmat1327] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2004] [Accepted: 12/29/2005] [Indexed: 05/24/2023]
Abstract
Quantum effects dominate the behaviour of many diverse materials. Of particular current interest are those systems in the vicinity of a quantum critical point (QCP). Their physical properties are predicted to reflect those of the nearby QCP with universal features independent of the microscopic details. The prototypical QCP is the Luttinger liquid (LL), which is of relevance to many quasi-one-dimensional materials. The magnetic material KCuF3 realizes an array of weakly coupled spin chains (or LLs) and thus lies close to but not exactly at the LL quantum critical point. By using inelastic neutron scattering we have collected a complete data set of the magnetic correlations of KCuF3 as a function of momentum, energy and temperature. The LL description is found to be valid over an extensive range of these parameters, and departures from this behaviour at high and low energies and temperatures are identified and explained.
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Affiliation(s)
- Bella Lake
- Condensed Matter Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6393, USA.
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9
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Prelovsek P, Sega I, Bonca J. Scaling of the magnetic response in doped antiferromagnets. PHYSICAL REVIEW LETTERS 2004; 92:027002. [PMID: 14753960 DOI: 10.1103/physrevlett.92.027002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2003] [Indexed: 05/24/2023]
Abstract
A theory of the anomalous omega/T scaling of the dynamic magnetic response in cuprates at low doping is presented. It is based on the memory function representation of the dynamical spin susceptibility in a doped antiferromagnet where the damping of the collective mode is constant and large, whereas the equal-time spin correlations saturate at low T. Exact diagonalization results within the t-J model are shown to support assumptions. Consequences, for both the scaling function and the normalization amplitude, are well in agreement with neutron scattering results.
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Affiliation(s)
- P Prelovsek
- J. Stefan Institute, SI-1000 Ljubljana, Slovenia
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10
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Bao W, Chen Y, Qiu Y, Sarrao JL. Novel dynamic ccaling regime in hole-doped La2CuO4. PHYSICAL REVIEW LETTERS 2003; 91:127005. [PMID: 14525393 DOI: 10.1103/physrevlett.91.127005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2003] [Indexed: 05/24/2023]
Abstract
Only 3% hole doping by Li is sufficient to suppress the long-range three-dimensional (3D) antiferromagnetic order in La2CuO4. The spin dynamics of such a 2D spin liquid state at T<<J was investigated with measurements of the dynamic magnetic structure factor S(omega,q), using cold neutron spectroscopy, for single crystalline La2Cu0.94Li0.06O4. S(omega,q) peaks sharply at (pi,pi) and crosses over around 50 K from omega/T scaling to a novel low temperature regime characterized by a constant-energy scale. The possible connection to a crossover from the quantum critical to the quantum disordered regime of the 2D antiferromagnetic spin liquid is discussed.
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Affiliation(s)
- Wei Bao
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
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11
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Kopeć TK, Zaleski TA. Scaling near the quantum-critical point in the SO(5) theory of the high-T(c) superconductivity. PHYSICAL REVIEW LETTERS 2001; 87:097002. [PMID: 11531590 DOI: 10.1103/physrevlett.87.097002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2001] [Indexed: 05/23/2023]
Abstract
We study the quantum-critical point scenario within the unified theory of superconductivity and antiferromagnetism based on the SO(5) symmetry. Closed-form expression for the quantum-critical scaling function for the dynamic spin susceptibility is obtained from the lattice SO(5) quantum nonlinear sigma-model in three dimensions, revealing that in the quantum-critical region the frequency scale for spin excitations is simply set by the absolute temperature. Implications for the non-Fermi liquid behavior of the normal-state resistivity due to spin fluctuations in the quantum-critical region are also presented.
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Affiliation(s)
- T K Kopeć
- Institute for Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław, Poland
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12
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13
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Kennett MP, Chamon C. Time reparametrization group and the long time behavior in quantum glassy systems. PHYSICAL REVIEW LETTERS 2001; 86:1622-1625. [PMID: 11290208 DOI: 10.1103/physrevlett.86.1622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2000] [Indexed: 05/23/2023]
Abstract
We study the long time dynamics of a quantum version of the Sherrington-Kirkpatrick model. Time reparametrizations of the dynamical equations have a parallel with renormalization group transformations; in this language the long time behavior of this model is controlled by a reparametrization group ( R(p)G) fixed point of the classical dynamics. The irrelevance of quantum terms in the dynamical equations in the aging regime explains the classical nature of the out of equilibrium fluctuation-dissipation relation.
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Affiliation(s)
- M P Kennett
- Department of Physics, Princeton University, New Jersey 08544, USA
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14
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Aeppli G, Mason TE, Hayden SM, Mook HA, Kulda J. Nearly singular magnetic fluctuations in the normal state of a high-Tc cuprate superconductor. Science 1997; 278:1432-5. [PMID: 9367949 DOI: 10.1126/science.278.5342.1432] [Citation(s) in RCA: 257] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Polarized and unpolarized neutron scattering was used to measure the wave vector- and frequency-dependent magnetic fluctuations in the normal state (from the superconducting transition temperature, Tc = 35 kelvin, up to 350 kelvin) of single crystals of La1.86Sr0.14CuO4. The peaks that dominate the fluctuations have amplitudes that decrease as T-2 and widths that increase in proportion to the thermal energy, kBT (where kB is Boltzmann's constant), and energy transfer added in quadrature. The nearly singular fluctuations are consistent with a nearby quantum critical point.
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Affiliation(s)
- G Aeppli
- G. Aeppli, NEC Research Institute, 4 Independence Way, Princeton, NJ 08540, USA, and Riso National Laboratory, 4000 Roskilde, Denmark. T. E. Mason, Department of Physics, University of Toronto, Toronto, Canada, M5S 1A7 and Riso National Laboratory
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15
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Spin dopingvis-a-vis to charge doping in the paramagnetic phase ofLa 2 CuO 4 from 63 Cu NQR relaxation. ACTA ACUST UNITED AC 1997. [DOI: 10.1007/bf03185409] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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16
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Chapter 162 Electron-spin resonance on localized magnetic moments in metals. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s0168-1273(97)24007-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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17
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Eskes H, Grimberg R, Zaanen J. Quantizing charged magnetic domain walls: Strings on a lattice. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:R724-R727. [PMID: 9985419 DOI: 10.1103/physrevb.54.r724] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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18
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Zaanen J, Horbach ML. Charged domain-wall dynamics in doped antiferromagnets and spin fluctuations in cuprate superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:8671-8680. [PMID: 9982380 DOI: 10.1103/physrevb.53.8671] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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19
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Barzykin V, Pines D. Magnetic scaling in cuprate superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:13585-13600. [PMID: 9980557 DOI: 10.1103/physrevb.52.13585] [Citation(s) in RCA: 85] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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20
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Onufrieva F, Rossat-Mignod J. Theory of spin dynamics in high-Tc copper oxide superconductors. Application to neutron scattering. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:7572-7603. [PMID: 9979704 DOI: 10.1103/physrevb.52.7572] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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21
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Aronson MC, Osborn R, Robinson RA, Lynn JW, Chau R, Seaman CL, Maple MB. Non-Fermi-liquid scaling of the magnetic response in UCu5-xPdx(x=1,1.5). PHYSICAL REVIEW LETTERS 1995; 75:725-728. [PMID: 10060098 DOI: 10.1103/physrevlett.75.725] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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22
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Normand B, Lee PA. Dynamic susceptibility and photoemission in the t-t'-J model. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:15519-15539. [PMID: 9978511 DOI: 10.1103/physrevb.51.15519] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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23
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Ma S, Reich DH, Broholm C, Sternlieb BJ, Erwin RW. Spin correlations at finite temperature in an S=1 one-dimensional antiferromagnet. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:3289-3292. [PMID: 9979131 DOI: 10.1103/physrevb.51.3289] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Zhao G, Singh KK, Morris DE. Oxygen isotope effect on Néel temperature in various antiferromagnetic cuprates. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:4112-4117. [PMID: 9976694 DOI: 10.1103/physrevb.50.4112] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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25
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Chubukov AV, Sachdev S, Ye J. Theory of two-dimensional quantum Heisenberg antiferromagnets with a nearly critical ground state. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:11919-11961. [PMID: 10010065 DOI: 10.1103/physrevb.49.11919] [Citation(s) in RCA: 79] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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26
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Wermbter S. Self-consistent calculation of spin fluctuations for the two-dimensional Hubbard model and additional high-Tc pairing interaction. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:6869-6879. [PMID: 10009412 DOI: 10.1103/physrevb.49.6869] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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27
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Matsuda M, Yamada K, Endoh Y, Thurston TR, Shirane G, Birgeneau RJ, Kastner MA, Tanaka I, Kojima H. Spin fluctuations in superconducting La1.85Sr0.15CuO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:6958-6966. [PMID: 10009423 DOI: 10.1103/physrevb.49.6958] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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28
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Zimanyi GT, Bedell KS. Antiferromagnetic marginal Fermi liquid. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:6575-6587. [PMID: 10009211 DOI: 10.1103/physrevb.48.6575] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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29
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Sherman A, Schreiber M. Magnetic excitations of a doped two-dimensional antiferromagnet. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:7492-7498. [PMID: 10006916 DOI: 10.1103/physrevb.48.7492] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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30
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Gooding RJ, Mailhot A. Spin texture of weakly doped CuO2 planes. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:6132-6135. [PMID: 10009151 DOI: 10.1103/physrevb.48.6132] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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31
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Kakurai K, Shamoto S, Kiyokura T, Sato M, Tranquada JM, Shirane G. Neutron-scattering study of magnetic fluctuations in Zn-substituted YBa2Cu3O6.6. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:3485-3490. [PMID: 10008779 DOI: 10.1103/physrevb.48.3485] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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32
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Carretta P, Corti M, Rigamonti A. Spin dynamics in CuO and Cu1-xLixO from 63Cu and 7Li nuclear relaxation. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:3433-3444. [PMID: 10008773 DOI: 10.1103/physrevb.48.3433] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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33
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Littlewood PB, Zaanen J, Aeppli G, Monien H. Spin fluctuations in a two-dimensional marginal Fermi liquid. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:487-498. [PMID: 10006799 DOI: 10.1103/physrevb.48.487] [Citation(s) in RCA: 59] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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34
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Ye J, Sachdev S, Read N. Solvable spin glass of quantum rotors. PHYSICAL REVIEW LETTERS 1993; 70:4011-4014. [PMID: 10054022 DOI: 10.1103/physrevlett.70.4011] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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35
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Bénard P, Chen L, Tremblay A. Magnetic neutron scattering from two-dimensional lattice electrons: The case of La2-xSrxCuO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:15217-15241. [PMID: 10005896 DOI: 10.1103/physrevb.47.15217] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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36
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Sachdev S, Ye J. Gapless spin-fluid ground state in a random quantum Heisenberg magnet. PHYSICAL REVIEW LETTERS 1993; 70:3339-3342. [PMID: 10053843 DOI: 10.1103/physrevlett.70.3339] [Citation(s) in RCA: 160] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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37
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Si Q, Zha Y, Levin K, Lu JP. Comparison of spin dynamics in YBa2Cu3O7- delta and La2-xSrxCuO4: Effects of Fermi-surface geometry. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:9055-9076. [PMID: 10004956 DOI: 10.1103/physrevb.47.9055] [Citation(s) in RCA: 119] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Sternlieb BJ, Shirane G, Tranquada JM, Sato M, Shamoto S. Temperature dependence of the dynamic susceptibility chi "( omega ) in superconducting YBa2Cu3O6.6 (Tc=53 K). PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:5320-5324. [PMID: 10006698 DOI: 10.1103/physrevb.47.5320] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Sarker SK. Coulomb interactions and stability of the spiral states in the t-J model. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:2940-2943. [PMID: 10006367 DOI: 10.1103/physrevb.47.2940] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Cho JH, Chou FC, Johnston DC. Phase Separation and Finite Size Scaling in La2-xSrxCuO4+ delta. PHYSICAL REVIEW LETTERS 1993; 70:222-225. [PMID: 10053733 DOI: 10.1103/physrevlett.70.222] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Keimer B, Belk N, Birgeneau RJ, Cassanho A, Chen CY, Greven M, Kastner MA, Aharony A, Endoh Y, Erwin RW, Shirane G. Magnetic excitations in pure, lightly doped, and weakly metallic La2CuO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:14034-14053. [PMID: 10003473 DOI: 10.1103/physrevb.46.14034] [Citation(s) in RCA: 269] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Sachdev S, Ye J. Universal quantum-critical dynamics of two-dimensional antiferromagnets. PHYSICAL REVIEW LETTERS 1992; 69:2411-2414. [PMID: 10046478 DOI: 10.1103/physrevlett.69.2411] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Thurston TR, Gehring PM, Shirane G, Birgeneau RJ, Kastner MA, Endoh Y, Matsuda M, Yamada K, Kojima H, Tanaka I. Low-energy incommensurate spin excitations in superconducting La1.85Sr0.15CuO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:9128-9131. [PMID: 10002699 DOI: 10.1103/physrevb.46.9128] [Citation(s) in RCA: 76] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Wang YR, Rice MJ, Choi H. Marginal-Fermi-liquid behavior of charge carriers scattered by two-dimensional quantum antiferromagnetic spin fluctuations. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:8624-8627. [PMID: 10002637 DOI: 10.1103/physrevb.46.8624] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Tranquada JM, Gehring PM, Shirane G, Shamoto S, Sato M. Neutron-scattering study of the dynamical spin susceptibility in YBa2Cu3O6.6. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:5561-5575. [PMID: 10004343 DOI: 10.1103/physrevb.46.5561] [Citation(s) in RCA: 162] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Cho JH, Borsa F, Johnston DC, Torgeson DR. Spin dynamics in La2-xSrxCuO4 (0.02 <= x <= 0.08) from 139La NQR relaxation: Fluctuations in a finite-length-scale system. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:3179-3182. [PMID: 10004028 DOI: 10.1103/physrevb.46.3179] [Citation(s) in RCA: 62] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Littlewood PB, Varma CM. Phenomenology of the superconductive state of a marginal Fermi liquid. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:405-420. [PMID: 10002225 DOI: 10.1103/physrevb.46.405] [Citation(s) in RCA: 58] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Ruvalds J, Rieck CT, Zhang J, Virosztek A. Spin Susceptibility Scaling in High-Temperature Superconductors. Science 1992; 256:1664-7. [PMID: 17841087 DOI: 10.1126/science.256.5064.1664] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The spin response of a nested Fermi surface represented by a tight binding energy band is found to exhibit scaling in frequency divided by temperature within a restricted regime close to half-filling of the band. Computations of the spin susceptibility reveal a surprising momentum variation at various temperatures and frequencies. Neutron scattering data on the high-temperature superconductor YBa(2)Cu(3)O(6+x) are analyzed for scaling near a momentum vector that spans nested regions of the orbit. Changes in the Fermi energy remove the scaling properties and reduce the susceptibility to the conventional Fermi liquid behavior of ordinary metals. These results imply that pairing mechanisms of superconductivity need to cope with competing spin density wave and charge density wave instabilities.
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Manousakis E. Spin correlations in a two-dimensional Heisenberg antiferromagnet doped with static holes. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:7570-7573. [PMID: 10000561 DOI: 10.1103/physrevb.45.7570] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Mason TE, Aeppli G, Mook HA. Magnetic dynamics of superconducting La1.86Sr0.14CuO4. PHYSICAL REVIEW LETTERS 1992; 68:1414-1417. [PMID: 10046160 DOI: 10.1103/physrevlett.68.1414] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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