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Crystals 2012, 2(3), 996-1016; doi:10.3390/cryst2030996

Theoretical Studies on Phase Transitions in Quasi-One-Dimensional Molecular Conductors

1
Department of Physics, Nara Women’s University, Nara 630-8506, Japan
2
Advanced Institute for Computational Science, RIKEN, Kobe, Hyogo 650-0047, Japan
3
Condensed Matter Theory Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
4
Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), Wako, Saitama 351-0198, Japan
*
Author to whom correspondence should be addressed.
Received: 16 April 2012 / Revised: 3 July 2012 / Accepted: 4 July 2012 / Published: 19 July 2012
(This article belongs to the Special Issue Molecular Conductors)
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Abstract

A review is given for recent theoretical studies on phase transitions in quasi-one-dimensional molecular conductors with a quarter-filled band. By lowering temperature, charge transfer salts exhibit a variety of transitions accompanying symmetry breaking, such as charge ordering, lattice dimerization, antiferromagnetic transition, spin-Peierls distortion, and so on. Analyses on microscopic quasi-one-dimensional models provide their systematic understandings, by the complementary use of different analytical and numerical techniques; they can reproduce finite-temperature phase transitions, whose results can be directly compared with experiments and give feedbacks to material design.
Keywords: molecular conductors; quasi-one-dimension; phase transition; charge order; metal-insulator transition; symmetry breaking; bosonization; renormalization group; quantum Monte Carlo; extended Hubbard model molecular conductors; quasi-one-dimension; phase transition; charge order; metal-insulator transition; symmetry breaking; bosonization; renormalization group; quantum Monte Carlo; extended Hubbard model
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Yoshioka, H.; Otsuka, Y.; Seo, H. Theoretical Studies on Phase Transitions in Quasi-One-Dimensional Molecular Conductors. Crystals 2012, 2, 996-1016.

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