Electronic specific heat at the boundary region of the metal-insulator transition in the two-dimensional electronic system of κ-(BEDT-TTF)2Cu[N(CN)2]Br

被引：43
|
作者：
Nakazawa, Y [1 ]
Taniguchi, H
Kawamoto, A
Kanoda, K
机构：
[1] Inst Mol Sci, Okazaki, Aichi 4448585, Japan
[2] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan
[3] Hokkaido Univ, Dept Phys, Sapporo, Hokkaido 0600810, Japan
[4] Japan Sci & Technol Corp, PRESTO, Tokyo, Japan
来源：
PHYSICAL REVIEW B | 2000年 / 61卷 / 24期
关键词：
D O I：
10.1103/PhysRevB.61.R16295
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The electronic specific heat of partially deuterated organic conductors kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br, [where BEDT-TTF denotes bis(ethylenedithio)tetrathiafulvalene], which are situated around the critical boundary of a metal-insulator transition in two dimensions, are studied. It was found that when the system has access to the M-I boundary with the progressive deuteration of BEDT-TTF molecules, the normal-state gamma term diminishes. The absence of mass enhancement is marked as a basis for the future study of electronic features related to the nature of superconductivity and also on the universality and variation of a possible Mott transition in two-dimensional systems.
引用
收藏
页码：R16295 / R16298
页数：4
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