Magnetic field-induced charge-density-wave transitions: The role of the orbital and Pauli effects

被引：5
|
作者：
Kartsovnik, M. V. [1 ]
Andres, D. [1 ]
Biberacher, W. [1 ]
Mueller, H. [2 ]
机构：
[1] Walther Meissner Inst Tieftemp Forsch, Bayer Akad Wissensch, D-85748 Garching, Germany
[2] European Synchrotron Radiat Facil, F-38043 Grenoble, France
来源：
PHYSICA B-CONDENSED MATTER | 2009年 / 404卷 / 3-4期
关键词：
Charge-density waves; Field-induced charge-density waves; Organic metals; PHASE-DIAGRAM; ORGANIC CONDUCTOR; ALPHA-(BEDT-TTF)(2)KHG(SCN)(4); STATE;
D O I：
10.1016/j.physb.2008.11.028
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Due to a low transition temperature and, correspondingly, a small energy gap, the charge-density-wave (CDW) state of the layered organic metal alpha-(BEDT-TTF)(2)KHg(SCN)(4) is very sensitive to pressure and magnetic field. The latter couples to the CDW via two competing mechanisms: Pauli paramagnetism and orbital motion of charge carriers in a magnetic field. We study the interplay between the Pauli and orbital effects under a pressure of 2.8 kbar, in the region of the field-induced CDW (FICDW) instability. We find that, in agreement with theoretical predictions, the FICDW state is enhanced when the Zeeman splitting becomes commensurate with the orbital quantization. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：357 / 359
页数：3
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