Influence of charge order on the ground state of TMTTF conductors

被引：11
|
作者：
Zamborszky, F [1 ]
Yu, W
Raas, W
Brown, SE
Alavi, B
Merlic, CA
Baur, A
Lefebvre, S
Wzietek, P
机构：
[1] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA
[2] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[3] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA
[4] Univ Sherbrooke, CERPEMA, Dept Phys, Sherbrooke, PQ J1K 2R1, Canada
[5] Univ Paris 11, Phys Solides Lab, URA 2, CNRS, F-91405 Orsay, France
来源：
JOURNAL DE PHYSIQUE IV | 2002年 / 12卷 / PR9期
关键词：
D O I：
10.1051/jp4:20020380
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Properties of the charge-ordered (CO) phase for the representative salt (TMTTF)(2)AsF6 are determined using C-13 and As-75 nuclei as probes. The charge disproportionation ratio is found to be at least 3:1 at temperatures below the transition temperature T-CO. At lower temperatures, the material undergoes a second transition to a singlet ground state. Investigations of the relative stability of the two orders under applied pressure reveal that the two orders compete. The phase diagram consists of a region of coexistence and a tetracritical point.
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页码：139 / 144
页数：6
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