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Guster B, Pruneda M, Ordejón P, Canadell E, Pouget JP. Fermi surface electron-hole instability of the (TMTSF) 2PF 6Bechgaard salt revealed by the first-principles Lindhard response function. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:345701. [PMID: 32235047 DOI: 10.1088/1361-648x/ab8522] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 03/31/2020] [Indexed: 06/11/2023]
Abstract
We report the first-principles DFT calculation of the electron-hole Lindhard response function of the (TMTSF)2PF6Bechgaard salt using the real triclinic low-temperature structure. The Lindhard response is found to change considerably with temperature. Near the 2kFspin density wave (SDW) instability it has the shape of a broad triangular plateau as a result of the multiple nesting associated with the warped quasi-one-dimensional Fermi surface. The evolution of the 2kFbroad maximum as well as the effect of pressure and deuteration is calculated and analyzed. The thermal dependence of the electron-hole coherence length deduced from these calculations compares very well with the experimental thermal evolution of the 2kFbond order wave correlation length. The existence of a triangular plateau of maxima in the low-temperature electron-hole Lindhard response of (TMTSF)2PF6should favor a substantial mixing ofq-dependent fluctuations which can have important consequences in understanding the phase diagram of the 2kFSDW ground state, the mechanism of superconductivity and the magneto-transport of this paradigmatic quasi-one-dimensional material. The first-principles DFT Lindhard response provides a very accurate and unbiased approach to the low-temperature instabilities of (TMTSF)2PF6which can take into account in a simple way 3D effects and subtle structural variations, thus providing a very valuable tool in understanding the remarkable physics of molecular conductors.
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Affiliation(s)
- Bogdan Guster
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus Bellaterra, 08193 Barcelona, Spain
| | - Miguel Pruneda
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus Bellaterra, 08193 Barcelona, Spain
| | - Pablo Ordejón
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus Bellaterra, 08193 Barcelona, Spain
| | - Enric Canadell
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus Bellaterra, 08193 Bellaterra, Spain
| | - Jean-Paul Pouget
- Laboratoire de Physique des Solides, CNRS UMR 8502, Université de Paris-Sud, Universié Paris-Saclay, 91405 Orsay, France
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Guster B, Pruneda M, Ordejón P, Canadell E, Pouget JP. Anion ordering transition and Fermi surface electron-hole instabilities in the (TMTSF) 2ClO 4 and (TMTSF) 2NO 3 Bechgaard salts analyzed through the first-principles Lindhard response function. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 33:085705. [PMID: 33091886 DOI: 10.1088/1361-648x/abc406] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The first-principles electron-hole Lindhard response function has been calculated and analyzed in detail for two (TMTSF)2 X (X = ClO4 and NO3) Bechgaard salts undergoing different anion-ordering (AO) transitions. The calculation was carried out using the real triclinic low-temperature structures. The evolution of the electron-hole response with temperature for both relaxed and quenched salts is discussed. It is shown that the 2k F response of the quenched samples of both salts display a low temperature curved and tilted triangular continuum of maxima. This is not the case for the relaxed samples. (TMTSF)2ClO4 in the AO state exhibits a more quasi-1D response than in the non AO state and relaxed (TMTSF)2NO3 shows a sharp maximum. The curved triangular plateau of the quenched samples results from multiple nesting of the warped quasi-1D Fermi surface which implies the existence of a large q range of electron-hole fluctuations. This broad maxima region is around 1% of the Brillouin zone area for the X = ClO4 salt (and X = PF6) but only 0.1% for the X = NO3 salt. It is suggested that the strong reduction of associated SDW fluctuations could explain the non detection of the SDW-mediated superconductivity in (TMTSF)2NO3. The calculated maxima of the Lindhard response nicely account for the modulation wave vector experimentally determined by NMR in the SDW ground state of the two salts. The critical AO wave vector for both salts is located in regions where the Lindhard response is a minimum so that they are unrelated to any electron-hole instability. The present first-principles calculation reveals 3D effects in the Lindhard response of the two salts at low temperature which are considerably more difficult to model in analytical approaches.
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Affiliation(s)
- Bogdan Guster
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus Bellaterra, 08193 Barcelona, Spain
| | - Miguel Pruneda
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus Bellaterra, 08193 Barcelona, Spain
| | - Pablo Ordejón
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus Bellaterra, 08193 Barcelona, Spain
| | - Enric Canadell
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus Bellaterra, 08193 Bellaterra, Spain
| | - Jean-Paul Pouget
- Laboratoire de Physique des Solides, CNRS UMR 8502, Université de Paris-Sud, Universié Paris-Saclay, 91405 Orsay, France
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Filibian M, Carretta P, Mozzati MC, Ghigna P, Zoppellaro G, Ruben M. Strong electronic correlations in LixZnPc organic metals. PHYSICAL REVIEW LETTERS 2008; 100:117601. [PMID: 18517827 DOI: 10.1103/physrevlett.100.117601] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2007] [Indexed: 05/26/2023]
Abstract
Nuclear magnetic resonance, electron paramagnetic resonance and magnetization measurements show that bulk LixZnPc are strongly correlated one-dimensional metals. The temperature dependence of the nuclear spin-lattice relaxation rate 1/T_{1} and of the static uniform susceptibility chi_{S} on approaching room temperature are characteristic of a Fermi liquid. Moreover, while for x approximately 2 the electrons are delocalized down to low temperature, for x-->4 a tendency towards localization is noticed upon cooling, yielding an increase both in 1/T_{1} and chi_{s}. The x dependence of the effective density of states at the Fermi level D(E_{F}) displays a sharp enhancement for x approximately 2, at the half filling of the ZnPc lowest unoccupied molecular orbitals. This suggests that LixZnPc is on the edge of a metal-insulator transition where enhanced superconducting fluctuations could develop.
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Affiliation(s)
- M Filibian
- Department of Physics A. Volta, University of Pavia, Via Bassi 6, I-27100 Pavia, Italy
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Bourbonnais C, Jérome D. Interacting Electrons in Quasi-One-Dimensional Organic Superconductors. THE PHYSICS OF ORGANIC SUPERCONDUCTORS AND CONDUCTORS 2008. [DOI: 10.1007/978-3-540-76672-8_12] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Nickel JC, Duprat R, Bourbonnais C, Dupuis N. Triplet superconducting pairing and density-wave instabilities in organic conductors. PHYSICAL REVIEW LETTERS 2005; 95:247001. [PMID: 16384408 DOI: 10.1103/physrevlett.95.247001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2005] [Indexed: 05/05/2023]
Abstract
Using a renormalization group approach, we determine the phase diagram of an extended quasi-one-dimensional electron gas model that includes interchain hopping, nesting deviations, and both intrachain and interchain repulsive interactions. We find a close proximity of spin-density- and charge-density-wave phases and singlet d-wave and triplet f-wave superconducting phases. There is a striking correspondence between our results and recent puzzling experimental findings in the Bechgaard salts, including the coexistence of spin-density-wave and charge-density-wave phases and the possibility of a triplet pairing in the superconducting phase.
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Affiliation(s)
- J C Nickel
- Regroupement Québecois sur les Matériaux de Pointe, Département de Physique, Université de Sherbrooke, Sherbrooke, Québec, Canada
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Baudron SA, Batail P, Coulon C, Clérac R, Canadell E, Laukhin V, Melzi R, Wzietek P, Jérome D, Auban-Senzier P, Ravy S. (EDT-TTF-CONH2)6[Re6Se8(CN)6], a metallic Kagome-type organic-inorganic hybrid compound: electronic instability, molecular motion, and charge localization. J Am Chem Soc 2005; 127:11785-97. [PMID: 16104757 DOI: 10.1021/ja0523385] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
(EDT-TTF-CONH2)6[Re6Se8(CN)6], space group R, was prepared by electrocrystallization from the primary amide-functionalized ethylenedithiotetrathiafulvalene, EDT-TTF-CONH2 (E(1/2)1 = 0.49 V vs SCE in CH3CN), and the molecular cluster tetraanion, [Re6Se8(CN)6]4- (E(1/2) = 0.33 V vs SCE in CH3CN), equipped with hydrogen bond donor and hydrogen bond acceptor functionalities, respectively. Its Kagome topology is unprecedented for any TTF-based materials. The metallic state observed at room temperature has a strong two-dimensional character, in coherence with the Kagome lattice symmetry, and the presence of minute amounts of [Re6Se8(CN)6](3-)* identified by electron spin spectroscopy. A structural instability toward a distorted form of the Kagome topology of lesser symmetry is observed at ca. 180 K. The low-temperature structure is associated with a localized, electrically insulating electronic ground state and its magnetic susceptibility accounted for by a model of uniform chains of localized S = 1/2 spins in agreement with the 100 K triclinic crystal structure and band structure calculations. A sliding motion, within one out of the three (EDT-TTF-CONH2)2 dimers coupled to the [Re6Se8(CN6)(3-)*]/[Re6Se8(CN6)4-] proportion at any temperature, and the electronic ground state of the organic-inorganic hybrid material are analyzed on the basis of ESR, dc conductivity, 1H spin-lattice relaxation, and static susceptibility data which qualify a Mott localization in [EDT-TTF-CONH2]6[Re6Se8(CN)6]. The coupling between the metal-insulator transition and a structural transition allows for the lifting of a degeneracy due to the ternary axis in the high temperature, strongly correlated metallic phase which, in turn, leads to Heisenberg chains at low temperature.
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Affiliation(s)
- Stéphane A Baudron
- Laboratoire de Chimie, Ingénierie Moléculaire et Matériaux d'Angers, UMR 6200 CNRS-Université d'Angers, 2 Boulevard Lavoisier, 49045 Angers, France
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Wu W, Chaikin PM, Kang W, Shinagawa J, Yu W, Brown SE. 77Se NMR probe of magnetic excitations of the magic angle effect in (TMTSF)2PF6. PHYSICAL REVIEW LETTERS 2005; 94:097004. [PMID: 15783991 DOI: 10.1103/physrevlett.94.097004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2004] [Indexed: 05/24/2023]
Abstract
We report 77Se spin-lattice relaxation rates for (TMTSF)2PF6, carried out in the regime where a set of spectacular transport anomalies known as the "magic angle effects" are observed. In situ resistance measurements (R(zz)) were used to verify the experimental conditions and give precise sample alignment information. We found that the 77Se T-11 exhibits no significant changes as the magnetic-field orientation is rotated through the magic angles, and conclude that there is no evidence for either a single-particle gap or a spin gap. The clearly observed field-induced spin-density wave transition temperature is also, unexpectedly, not enhanced at the magic angles.
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Affiliation(s)
- Weida Wu
- Department of Physics, Princeton University, Princeton, New Jersey 08544, USA
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Seo H, Hotta C, Fukuyama H. Toward Systematic Understanding of Diversity of Electronic Properties in Low-Dimensional Molecular Solids. Chem Rev 2004; 104:5005-36. [PMID: 15535640 DOI: 10.1021/cr030646k] [Citation(s) in RCA: 331] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hitoshi Seo
- Correlated Electron Research Center (CERC), AIST Tsukuba Central 4, Ibaraki 305-8562, Japan
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Moser J, Cooper JR, Jerome D, Alavi B, Brown SE, Bechgaard K. Hall effect in the normal phase of the organic superconductor (TMTSF)2PF6. PHYSICAL REVIEW LETTERS 2000; 84:2674-2677. [PMID: 11017297 DOI: 10.1103/physrevlett.84.2674] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/1999] [Indexed: 05/23/2023]
Abstract
We report accurate Hall effect measurements performed in the normal phase of the quasi-one-dimensional organic conductor (TMTSF)2PF6 at ambient pressure. The Hall coefficient is found to be strongly temperature dependent all the way from 300 K down to the spin density wave onset arising around 12 K. These new results emphasize the existence of a high temperature regime above 130 K where the Fermi liquid model is not satisfactory.
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Affiliation(s)
- J Moser
- Laboratoire de Physique des Solides, Universite Paris-Sud, 91405 Orsay, France
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Mihaly G, Kezsmarki I, Zamborszky F, Forro L. Hall effect and conduction anisotropy in the organic conductor (TMTSF)2PF6. PHYSICAL REVIEW LETTERS 2000; 84:2670-2673. [PMID: 11017296 DOI: 10.1103/physrevlett.84.2670] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/1999] [Indexed: 05/23/2023]
Abstract
Both the Hall effect and the ab(')-plane conduction anisotropy are directly addressing the unconventional normal phase properties of the Bechgaard salt (TMTSF)2PF6. We found that the dramatic reduction of the carrier density deduced from recent optical data is not reflected in an enhanced Hall resistance. The pressure and temperature dependence of the b(')-direction resistivity reveal isotropic relaxation time and do not require explanations beyond the Fermi liquid theory. Our results allow a coherent-diffusive transition in the interchain carrier propagation, however the possible crossover to Luttinger liquid behavior is placed at an energy scale above room temperature.
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Affiliation(s)
- G Mihaly
- IGA, Ecole Politechnique Federale de Lausanne, CH-1015 Lausanne, Switzerland and Department of Physics, Technical University of Budapest, H-1111 Budapest, Hungary
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Capponi S, Poilblanc D, Mila F. Confinement and transverse conductivity in coupled Luttinger liquids. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:17547-17556. [PMID: 9985878 DOI: 10.1103/physrevb.54.17547] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Favand J, Mila F. Theory of the optical conductivity of (TMTSF)2PF6 in the midinfrared range. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:10425-10429. [PMID: 9984838 DOI: 10.1103/physrevb.54.10425] [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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Mila F. Deducing correlation parameters from optical conductivity in the Bechgaard salts. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:4788-4793. [PMID: 9981659 DOI: 10.1103/physrevb.52.4788] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Dupuis N. Larkin-Ovchinnikov-Fulde-Ferrell state in quasi-one-dimensional superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:9074-9083. [PMID: 9977547 DOI: 10.1103/physrevb.51.9074] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Mila F, Penc K. Susceptibility of the one-dimensional dimerized Hubbard model. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:1997-2000. [PMID: 9978936 DOI: 10.1103/physrevb.51.1997] [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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Ilakovac V, Ravy S, Pouget JP, Lenoir C, Boubekeur K, Batail P, Babic SD, Biskup N, Korin-Hamzic B, Tomic S, Bourbonnais C. Enhanced charge localization in the organic alloys. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:7136-7139. [PMID: 9974671 DOI: 10.1103/physrevb.50.7136] [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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Thier KF, Mehring M. 13C NMR study of the metal-insulator and structural phase transition in the organic conductor (fluoranthenyl)2PF6. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:2142-2149. [PMID: 9976427 DOI: 10.1103/physrevb.50.2142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Lefebvre J, Beerens J, Bourbonnais C, Caron LG, Lenoir C, Batail P. Gap determination in the field-induced-spin-density-wave state of (TMTSF)2ClO4 via far-infrared photoconductivity. PHYSICAL REVIEW LETTERS 1994; 72:3417-3420. [PMID: 10056193 DOI: 10.1103/physrevlett.72.3417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Penc K, Mila F. Phase diagram of the one-dimensional extended Hubbard model with attractive and/or repulsive interactions at quarter filling. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:9670-9678. [PMID: 10009767 DOI: 10.1103/physrevb.49.9670] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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