Two-dimensional Fermi surface for the organic conductor κ-(BETS)2FeBr4

被引：35
|
作者：
Uji, S
Shinagawa, H
Terai, Y
Yakabe, T
Terakura, C
Terashima, T
Balicas, L
Brooks, JS
Ojima, E
Fujiwara, H
Kobayashi, H
Kobayashi, A
Tokumoto, M
机构：
[1] Natl Res Inst Met, Tsukuba, Ibaraki 3050003, Japan
[2] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA
[3] Inst Mol Sci, Okazaki, Aichi 4448585, Japan
[4] Univ Tokyo, Sch Sci, Res Ctr Spectrochem, Tokyo 1130033, Japan
[5] Electrotech Lab, Tsukuba, Ibaraki 3058568, Japan
来源：
PHYSICA B | 2001年 / 298卷 / 1-4期
关键词：
organic conductors; quantum oscillation; Fermi surface;
D O I：
10.1016/S0921-4526(01)00382-9
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Magnetoresistance measurements have been performed for the organic conductor kappa-(BETS)(2) FeBr4 to investigate the Fermi surface. Three fundamental Shubnikov-de Haas oscillations (alpha, beta and gamma) were observed. The cross-sectional areas corresponding to the cc and P oscillations are about 20% and 100% in the first Brillouin zone, respectively. The oscillations can be assigned to the closed orbit and the magnetic breakdown orbit. The effective masses of the conduction electrons are determined to be 5.2m(0), for alpha and 7.9m(0) for beta. The heavy masses are probably due to the antiferromagnetic fluctuation effect of the Fe spins. The origin of the oscillation gamma with very low frequency is not explained by the band calculation. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：557 / 561
页数：5
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