Journal ArticleDOI
Physical Properties of One Dimensional Conductors
Pierre Delhaes,Claude Coulon,J. Amiell,Serge Flandrois,E. Toreilles,Jean-Marc Fabre,L. Giral +6 more
TLDR
In this article, the dominant interactions between electron-electron and electron-phonon coupling inside the cation-radical chains were analyzed and it was shown that the metallic behavior at high temperatures and the occurrence of a Peierls distorsion below 100 K arise mainly from a competition between electron electron and electron phonons.Abstract:
In the course of investigations of organic metals we have investigated the cation-radical series TMTTF2-X′ with X′ = BF4, ClO4, PF6, SCN and Br. On this isomorphous series a large range of physical properties have been studied: electrical conductivity, magnetic susceptibility, EPR, optical reflectivity and specific heat. In correlation with crystallographic results, which indicate the existence of TMTTF diads, the dominant interactions are analyzed. It results that the metallic behavior at high temperatures and the occurrence of a Peierls distorsion below 100 K arise mainly from a competition between electron-electron and electron-phonon coupling inside the cation-radical chainsread more
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Journal ArticleDOI
Organic conductors and superconductors
Denis Jérome,H. J. Schulz +1 more
TL;DR: In this article, the authors present the most salient developments of research on organic conductors and superconductors during the past 10 years, including lattice instability in TTF-TCNQ and related compounds, superconducting or antiferromagnetic instabilities in the (TMTSF) 2 X series.
Journal ArticleDOI
Development of Conductive Organic Molecular Assemblies: Organic Metals, Superconductors, and Exotic Functional Materials
Gunzi Saito,Yukihiro Yoshida +1 more
TL;DR: In this paper, the development of conductive organic molecular assemblies including organic metals, superconductors, single component conductors, conductive films, and conductive liquids was introduced.
Book ChapterDOI
Superconductivity in a synthetic organic conductor (TMTSF)2PF6(
TL;DR: In this paper, superconductivity has been observed by resistive measurements in the quasi-one dimensional organic conductor di-(tetramethyltetraselenafulvalene)-hexafluorophosphate, (TMTSF)2PF6 under a hydrostatic pressure of 12 kbar with a transition temperature of 0.9 K.
Journal ArticleDOI
Two-dimensionality and suppression of metal-semiconductor transition in a new organic metal with alkylthio substituted TTF and perchlorate
TL;DR: In this paper, a new organic cation radical salt with bis(ethylenedithiolo)-tetrathiafulvalene and perchlorate was prepared by the electrocrystalization technique.
Journal ArticleDOI
Synthesis, Reactions, and Selected Physico-Chemical Properties of 1,3-and 1,2-Tetrachalcogenafulvalenes
G. Schukat,Egon Fanghänel +1 more
TL;DR: In this article, the synthesis of 1,3-and 1,2-tetrachalcogenafulvalenes, the chemical transformation of substituents, reactions of the ring systems and synthesis of polymers with tetrathiafulvalene units in the backbone and in the side chain are discussed.
References
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Book ChapterDOI
g Factors and Spin-Lattice Relaxation of Conduction Electrons
TL;DR: The use of spin resonance in semiconductors and semimetals grows as better materials are made and detailed knowledge about their band structure becomes available as discussed by the authors. But spin resonance does not play a useful supplementary role when something about the band structure is known, serving either as a check on the band model or determining the values of additional parameters.
Journal ArticleDOI
Fluctuation Effects at a Peierls Transition
TL;DR: In this article, the effects of fluctuations on the Peierls transition in one dimension are calculated by taking a functional average over variations in the order parameter, and it is found that the transition is suppressed to a temperature of approximately one quarter of the mean-field transition but remains fairly sharp.
Journal ArticleDOI
Landau theory of charge-density waves in transition-metal dichalcogenides
TL;DR: In this article, a Landau theory is proposed for charge-density waves (CDW) in transition-metal dichalcogenides with the charge density as an order parameter, which predicts the sequence of phases, normal-state, commensurate-CDW, with decreasing temperature, separated by first-order phase transitions.
Journal ArticleDOI
Spin density wave and soft phonon mode from nesting Fermi surfaces
S K Chan,Volker Heine +1 more
TL;DR: In this paper, the problems of spin density wave and soft phonon mode leading to periodic lattice distortion as a consequence of nesting Fermi surfaces have been investigated and necessary and sufficient criteria for the existence of each kind of instability and for the coexistence of the two kinds have been derived.