1
|
Possible Benefits from Phonon/Spin-Wave Induced Gaps below or above EF for Superconductivity in High-TC Cuprates. CONDENSED MATTER 2022. [DOI: 10.3390/condmat7020041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A phonon of appropriate momentum kF will open a band gap at the Fermi energy EF. The gap within the electronic density-of-states (DOS), N(EF), leads to a gain in electronic energy and a loss of elastic energy because of the gap-generating phonon. A BCS-like simulation shows that the energy gain is larger than the loss for temperatures below a certain transition temperature, TC. Here, it is shown that the energy count can be almost as favorable for gaps a little below or above EF. Such gaps can be generated by auxiliary phonons (or even spin- and charge-density waves) with k-vectors slightly different from kF. Gaps not too far from EF will add to the energy gain at the superconducting transition. In addition, a DOS-peak can appear at EF and thereby increase N(EF) and TC. A dip in the DOS below EF will result for temperatures below TC, which is similar to what often is observed in cuprate superconductors. The roles of spin waves and thermal disorders are discussed.
Collapse
|
2
|
Yang LX, Rohde G, Hanff K, Stange A, Xiong R, Shi J, Bauer M, Rossnagel K. Bypassing the Structural Bottleneck in the Ultrafast Melting of Electronic Order. PHYSICAL REVIEW LETTERS 2020; 125:266402. [PMID: 33449703 DOI: 10.1103/physrevlett.125.266402] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 11/23/2020] [Indexed: 06/12/2023]
Abstract
Impulsive optical excitation generally results in a complex nonequilibrium electron and lattice dynamics that involves multiple processes on distinct timescales, and a common conception is that for times shorter than about 100 fs the gap in the electronic spectrum is not seriously affected by lattice vibrations. Here, however, by directly monitoring the photoinduced collapse of the spectral gap in a canonical charge-density-wave material, the blue bronze Rb_{0.3}MoO_{3}, we find that ultrafast (∼60 fs) vibrational disordering due to efficient hot-electron energy dissipation quenches the gap significantly faster than the typical structural bottleneck time corresponding to one half-cycle oscillation (∼315 fs) of the coherent charge-density-wave amplitude mode. This result not only demonstrates the importance of incoherent lattice motion in the photoinduced quenching of electronic order, but also resolves the perennial debate about the nature of the spectral gap in a coupled electron-lattice system.
Collapse
Affiliation(s)
- L X Yang
- State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
- Frontier Science Center for Quantum Information, Beijing 100084, People's Republic of China
| | - G Rohde
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
| | - K Hanff
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
| | - A Stange
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
| | - R Xiong
- Department of Physics, Wuhan University, Wuhan 430072, People's Republic of China
| | - J Shi
- Department of Physics, Wuhan University, Wuhan 430072, People's Republic of China
| | - M Bauer
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
| | - K Rossnagel
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
- Ruprecht-Haensel-Labor, Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany
| |
Collapse
|
3
|
Storeck G, Horstmann JG, Diekmann T, Vogelgesang S, von Witte G, Yalunin SV, Rossnagel K, Ropers C. Structural dynamics of incommensurate charge-density waves tracked by ultrafast low-energy electron diffraction. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2020; 7:034304. [PMID: 32596414 PMCID: PMC7311179 DOI: 10.1063/4.0000018] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 04/13/2020] [Indexed: 06/11/2023]
Abstract
We study the non-equilibrium structural dynamics of the incommensurate and nearly commensurate charge-density wave (CDW) phases in 1T-TaS 2 . Employing ultrafast low-energy electron diffraction with 1 ps temporal resolution, we investigate the ultrafast quench and recovery of the CDW-coupled periodic lattice distortion (PLD). Sequential structural relaxation processes are observed by tracking the intensities of main lattice as well as satellite diffraction peaks and the diffuse scattering background. Comparing distinct groups of diffraction peaks, we disentangle the ultrafast quench of the PLD amplitude from phonon-related reductions of the diffraction intensity. Fluence-dependent relaxation cycles reveal a long-lived partial suppression of the order parameter for up to 60 ps, far outlasting the initial amplitude recovery and electron-phonon scattering times. This delayed return to a quasi-thermal level is controlled by lattice thermalization and coincides with the population of zone-center acoustic modes, as evidenced by a structured diffuse background. The long-lived non-equilibrium order parameter suppression suggests hot populations of CDW-coupled lattice modes. Finally, a broadening of the superlattice peaks is observed at high fluences, pointing to a non-linear generation of phase fluctuations.
Collapse
Affiliation(s)
- G. Storeck
- 4th Physical Institute, Solids and Nanostructures, University of Göttingen, 37077 Göttingen, Germany
| | - J. G. Horstmann
- 4th Physical Institute, Solids and Nanostructures, University of Göttingen, 37077 Göttingen, Germany
| | - T. Diekmann
- 4th Physical Institute, Solids and Nanostructures, University of Göttingen, 37077 Göttingen, Germany
| | - S. Vogelgesang
- 4th Physical Institute, Solids and Nanostructures, University of Göttingen, 37077 Göttingen, Germany
| | - G. von Witte
- 4th Physical Institute, Solids and Nanostructures, University of Göttingen, 37077 Göttingen, Germany
| | - S. V. Yalunin
- 4th Physical Institute, Solids and Nanostructures, University of Göttingen, 37077 Göttingen, Germany
| | | | - C. Ropers
- Author to whom correspondence should be addressed:
| |
Collapse
|
4
|
Roy B, Mukhuti K, Bansal B. Experimental determination of the bare energy gap of GaAs without the zero-point renormalization. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:10LT01. [PMID: 31746778 DOI: 10.1088/1361-648x/ab58f8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The energy gap of simple band insulators like GaAs is a strong function of temperature due to the electron-phonon interactions. Interestingly, the perturbation from zero-point phonons is also predicted to cause significant (a few percent) renormalization of the energy gap at absolute zero temperature but its value has been difficult to estimate both theoretically and, of course, experimentally. Given the experimental evidence (Bhattacharya et al 2015 Phys. Rev. Lett. 114 047402) that strongly supports that the exponential broadening (Urbach tail) of the excitonic absorption edge at low temperatures is the manifestation of this zero temperature electron-phonon scattering, we argue that the location of the Urbach focus is the zero temperature unrenormalized gap. Experiments on GaAs yield the zero temperature bare energy gap to be 1.581 eV and thus the renormalization is estimated to be 66 meV.
Collapse
Affiliation(s)
- Basabendra Roy
- Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia 741246, West Bengal, India
| | | | | |
Collapse
|
5
|
Breakdown of the Migdal approximation at Lifshitz transitions with giant zero-point motion in the H3S superconductor. Sci Rep 2016; 6:24816. [PMID: 27095368 PMCID: PMC4837402 DOI: 10.1038/srep24816] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 04/06/2016] [Indexed: 11/18/2022] Open
Abstract
While 203 K high temperature superconductivity in H3S has been interpreted by BCS theory in the dirty limit here we focus on the effects of hydrogen zero-point-motion and the multiband electronic structure relevant for multigap superconductivity near Lifshitz transitions. We describe how the topology of the Fermi surfaces evolves with pressure giving different Lifshitz-transitions. A neck-disrupting Lifshitz-transition (type 2) occurs where the van Hove singularity, vHs, crosses the chemical potential at 210 GPa and new small 2D Fermi surface portions appear with slow Fermi velocity where the Migdal-approximation becomes questionable. We show that the neglected hydrogen zero-point motion ZPM, plays a key role at Lifshitz transitions. It induces an energy shift of about 600 meV of the vHs. The other Lifshitz-transition (of type 1) for the appearing of a new Fermi surface occurs at 130 GPa where new Fermi surfaces appear at the Γ point of the Brillouin zone here the Migdal-approximation breaks down and the zero-point-motion induces large fluctuations. The maximum Tc = 203 K occurs at 160 GPa where EF/ω0 = 1 in the small Fermi surface pocket at Γ. A Feshbach-like resonance between a possible BEC-BCS condensate at Γ and the BCS condensate in different k-space spots is proposed.
Collapse
|
6
|
Artyukhov VI, Liu M, Yakobson BI. Mechanically induced metal-insulator transition in carbyne. NANO LETTERS 2014; 14:4224-9. [PMID: 24991984 DOI: 10.1021/nl5017317] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
First-principles calculations for carbyne under strain predict that the Peierls transition from symmetric cumulene to broken-symmetry polyyne structure is enhanced as the material is stretched. Interpretation within a simple and instructive analytical model suggests that this behavior is valid for arbitrary 1D metals. Further, numerical calculations of the anharmonic quantum vibrational structure of carbyne show that zero-point atomic vibrations eliminate the Peierls distortion in the mechanically free chain, preserving the cumulene symmetry. The emergence and increase of Peierls dimerization under tension then implies a qualitative transition between the two forms, which our computations place around 3% strain. Thus, the competition between the zero-point vibrations and mechanical strain determines a switch in symmetry resulting in the transition from metallic state to a dielectric, with a small effective mass and a high carrier mobility. In any practical realization, it is important that the effect is also chemically modulated by the choice of terminating groups. These findings are promising for applications such as electromechanical switching and band gap tuning via strain, and besides carbyne itself, they directly extend to numerous other systems that show Peierls distortion.
Collapse
Affiliation(s)
- Vasilii I Artyukhov
- Department of Materials Science and NanoEngineering, Department of Chemistry, and Smalley Institute for Nanoscale Science and Technology, Rice University , Houston, Texas 77005, United States
| | | | | |
Collapse
|
7
|
|
8
|
Bond alternation in infinite periodic polyacetylene: Dynamical treatment of the anharmonic potential. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.07.051] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
9
|
Buker DW. Charge-density waves arising from two electron bands. Proc Math Phys Eng Sci 2011. [DOI: 10.1098/rspa.2010.0085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
A theory for a quasi-one-dimensional incommensurate charge-density wave state arising from electron–phonon (el–phon) interaction connecting electron states in two different bands is presented. An expression for the fundamental component of the energy gap as a function of the effective el–phon coupling, valid for all coupling strengths, has been found. For a single band, the expression simplifies to a reciprocal hyperbolic-sine dependence on the reciprocal effective coupling. The effective coupling, although simply related to the
n
assumed phonon-band frequencies, is not generally expressible as a sum of independent functions of these frequencies. The theory is applied to tetrathiofulvalinium–tetracyanoquinodimethane and to potassium blue bronze.
Collapse
|
10
|
Abstract
An electron–phonon theory for a quasi-one-dimensional band of electrons forming a moving incommensurate charge-density wave (CDW) state at zero temperature is presented. A useful analytic expression for the energy gap as a function of electron–phonon coupling is found. The gap is quite a bit larger than the well-known weak-coupling result, even for modest coupling, where the mean-field approximation should still be valid. It is also shown that the form of the Hamiltonian implies that there is no spread at all in the wavevector of the CDW in the vicinity of 2
k
F
. Comparisons of theoretical and experimental values of the energy gap and the lattice displacement amplitude are made for NbSe
3
.
Collapse
|
11
|
Pan F, Dai LR, Draayer JP. Quasi-exact solvability of the one-dimensional Holstein model. ACTA ACUST UNITED AC 2006. [DOI: 10.1088/0305-4470/39/13/l02] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
12
|
O'Neill K, Slot E, Thorne RE, van der Zant HSJ. In-chain tunneling through charge-density-wave nanoconstrictions and break junctions. PHYSICAL REVIEW LETTERS 2006; 96:096402. [PMID: 16606288 DOI: 10.1103/physrevlett.96.096402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2005] [Indexed: 05/08/2023]
Abstract
We have fabricated longitudinal nanoconstrictions in the charge-density wave conductor (CDW) NbSe3 using a focused ion beam and using a mechanically controlled break-junction technique. Conductance peaks are observed below the TP1=145 K and TP2=59 K CDW transitions, which correspond closely with previous values of the full CDW gaps 2Delta1 and 2Delta2 obtained from photoemission. These results can be explained by assuming CDW-CDW tunneling in the presence of an energy gap corrugation epsilon2 comparable to Delta2, which eliminates expected peaks at +/-|Delta1+Delta2|. The nanometer length scales our experiments imply indicate that an alternative explanation based on tunneling through back-to-back CDW-normal-conductor junctions is unlikely.
Collapse
Affiliation(s)
- K O'Neill
- Kavli Institute of Nanoscience Delft, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
| | | | | | | |
Collapse
|
13
|
Huang Z, Lin HQ. Stability of the high-spin ground state in the Peierls-extended Hubbard model. J Chem Phys 2001. [DOI: 10.1063/1.1342237] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
14
|
McKenzie RH. Exact Results for Quantum Phase Transitions in Random XY Spin Chains. PHYSICAL REVIEW LETTERS 1996; 77:4804-4807. [PMID: 10062635 DOI: 10.1103/physrevlett.77.4804] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
15
|
Takahashi A. Effects of quantum fluctuations of electrons and lattice in doped polyacetylene. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:7965-7971. [PMID: 9984473 DOI: 10.1103/physrevb.54.7965] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
16
|
Kuroda N, Nishida M, Yamashita M. Subgap optical absorption induced by quantum lattice fluctuations at the Peierls edge in PtCl chain complexes. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:2390-2396. [PMID: 9986085 DOI: 10.1103/physrevb.54.2390] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
17
|
Caron LG, Moukouri S. Density matrix renormalization group applied to the ground state of the XY spin-Peierls system. PHYSICAL REVIEW LETTERS 1996; 76:4050-4053. [PMID: 10061179 DOI: 10.1103/physrevlett.76.4050] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
18
|
McKenzie RH, Hamer CJ, Murray DW. Quantum Monte Carlo study of the one-dimensional Holstein model of spinless fermions. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:9676-9687. [PMID: 9982524 DOI: 10.1103/physrevb.53.9676] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
19
|
Reilly MJ, Rojo AG. Two-magnon scattering and the spin-phonon interaction beyond the adiabatic approximation. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:6429-6434. [PMID: 9982041 DOI: 10.1103/physrevb.53.6429] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
20
|
Wu CQ. Quantum lattice fluctuations in the ground state of nondegenerate polymers. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:3630-3633. [PMID: 9983908 DOI: 10.1103/physrevb.53.3630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
21
|
Zheng H, Lin DL, George TF. Effect of quantum lattice fluctuations on the dimerized ground state of the Takayama-Lin-Liu-Maki model. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:2463-2473. [PMID: 9983749 DOI: 10.1103/physrevb.53.2463] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
22
|
Zheng H, Zhu SY. Effect of quantum lattice fluctuations on the optical-absorption spectrum of degenerate and nondegenerate polymers. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:3107-3112. [PMID: 9983818 DOI: 10.1103/physrevb.53.3107] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
23
|
McKenzie RH. Microscopic theory of the pseudogap and Peierls transition in quasi-one-dimensional materials. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:16428-16442. [PMID: 9981042 DOI: 10.1103/physrevb.52.16428] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
24
|
Scott B, Love SP, Kanner GS, Johnson SR, Wilkerson MP, Berkey M, Swanson BI, Saxena A, Huang X, Bishop A. Control of selected physical properties of MX solids: an experimental and theoretical investigation. J Mol Struct 1995. [DOI: 10.1016/0022-2860(95)08935-o] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
25
|
Huang QF, Wu CQ, Sun X. Effects of quantum lattice fluctuations on the charge-density wave of halogen-bridged mixed-valence transition-metal linear complexes. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:5637-5642. [PMID: 9981747 DOI: 10.1103/physrevb.52.5637] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
26
|
Degiorgi L, Thieme S, Alavi B, Grüner G, McKenzie RH, Kim K, Levy F. Fluctuation effects in quasi-one-dimensional conductors: Optical probing of thermal lattice fluctuations. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:5603-5610. [PMID: 9981743 DOI: 10.1103/physrevb.52.5603] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
27
|
McKenzie RH. Ginzburg-Landau theory of phase transitions in quasi-one-dimensional systems. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:6249-6260. [PMID: 9977163 DOI: 10.1103/physrevb.51.6249] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
28
|
Baranowski D, Büttner H. Incommensurate ground states in a one-dimensional model for electron-libron coupling in polyaniline. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:4042-4051. [PMID: 9979239 DOI: 10.1103/physrevb.51.4042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
29
|
Zheng H. Variational approach to the quantum lattice fluctuations in the Su-Schrieffer-Heeger model: The ground state. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:6717-6725. [PMID: 9974624 DOI: 10.1103/physrevb.50.6717] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
30
|
Eremko AA. Mean-field solution of the continuum Fröhlich problem at finite temperature. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:5160-5170. [PMID: 9976854 DOI: 10.1103/physrevb.50.5160] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
31
|
Harigaya K, Abe S. Optical-absorption spectra in fullerenes C60 and C70: Effects of Coulomb interactions, lattice fluctuations, and anisotropy. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:16746-16752. [PMID: 10010834 DOI: 10.1103/physrevb.49.16746] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
32
|
Coplin KA, Jasty S, Long SM, Manohar SK, Sun Y, MacDiarmid AG, Epstein AJ. Neutral soliton formation and disorder in pernigraniline base. PHYSICAL REVIEW LETTERS 1994; 72:3206-3209. [PMID: 10056134 DOI: 10.1103/physrevlett.72.3206] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
33
|
Degiorgi L, Grüner G, Kim K, McKenzie RH, Wachter P. Optical probing of thermal lattice fluctuations in charge-density-wave condensates. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:14754-14757. [PMID: 10010571 DOI: 10.1103/physrevb.49.14754] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
34
|
Hagler TW, Heeger AJ. Soliton-antisoliton configurations and the linear and nonlinear optical response of degenerate-ground-state conjugated polymers. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:7313-7336. [PMID: 10009470 DOI: 10.1103/physrevb.49.7313] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
35
|
Drechsler S, Malek J, Lavrentiev MY, Köppel H. Optical phonons of alternating chains with 3/4-filled bands and internal degrees of freedom: A simple model for Ca2CuO3. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:233-243. [PMID: 10009279 DOI: 10.1103/physrevb.49.233] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
36
|
Kim K, McKenzie RH, Wilkins JW. Universal subgap optical conductivity in quasi-one-dimensional Peierls systems. PHYSICAL REVIEW LETTERS 1993; 71:4015-4018. [PMID: 10055132 DOI: 10.1103/physrevlett.71.4015] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
37
|
Leng JM, McCall RP, Cromack KR, Sun Y, Manohar SK, MacDiarmid AG, Epstein AJ. Photoexcited solitons and polarons in pernigraniline-base polymers. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:15719-15731. [PMID: 10008124 DOI: 10.1103/physrevb.48.15719] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
38
|
Batistic I, Huang XZ, Bishop AR, Saxena A. Ionic interactions in platinum chloride linear-chain compounds. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:6065-6073. [PMID: 10009143 DOI: 10.1103/physrevb.48.6065] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
39
|
Massa NE. Photoinduced infrared absorptions in K0.3MoO3. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:5692-5695. [PMID: 10009097 DOI: 10.1103/physrevb.48.5692] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
40
|
Long FH, Love SP, Swanson BI, McKenzie RH. Evidence for modification of the electronic density of states by zero-point lattice motion in one dimension: Luminescence and resonance Raman studies of an MX solid. PHYSICAL REVIEW LETTERS 1993; 71:762-765. [PMID: 10055360 DOI: 10.1103/physrevlett.71.762] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
41
|
Zaitsev-Zotov SV. Classical-to-quantum crossover in charge-density wave creep at low temperatures. PHYSICAL REVIEW LETTERS 1993; 71:605-608. [PMID: 10055318 DOI: 10.1103/physrevlett.71.605] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
42
|
Harigaya K. Polaron excitations in doped C60: Effects of disorder. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:2765-2772. [PMID: 10008677 DOI: 10.1103/physrevb.48.2765] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
43
|
Harigaya K, Fujita M. Dimerization structures of metallic and semiconducting fullerene tubules. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:16563-16569. [PMID: 10006093 DOI: 10.1103/physrevb.47.16563] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
44
|
Mackie DM, Glick AJ. Semiclassical method for calculating quantum-lattice-fluctuation effects in conducting and/or optically active polymers, with results for polyacetylene in the soliton-antisoliton approximation. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:14212-14220. [PMID: 10005765 DOI: 10.1103/physrevb.47.14212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|