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

页码：R16295 / R16298

页数：4

共 33 条

[1] SPECIFIC-HEAT IN HIGH MAGNETIC-FIELD OF KAPPA-DI[BIS(ETHYLENEDITHIO)TETRATHIAFULVALENE]-DI(THIOCYANO)CUPRATE [KAPPA-(ET)2CU(NCS)2] - EVIDENCE FOR STRONG-COUPLING SUPERCONDUCTIVITY [J].

ANDRAKA, B ;

KIM, JS ;

STEWART, GR ;

CARLSON, KD ;

WANG, HH ;

WILLIAMS, JM .

PHYSICAL REVIEW B, 1989, 40 (16) :11345-11347

[2] SPECIFIC-HEAT OF THE HIGH-TC ORGANIC SUPERCONDUCTOR KAPPA-(ET)2CU[N(CN)2]BR [J].

ANDRAKA, B ;

JEE, CS ;

KIM, JS ;

STEWART, GR ;

CARLSON, KD ;

WANG, HH ;

CROUCH, AVS ;

KINI, AM ;

WILLIAMS, JM .

SOLID STATE COMMUNICATIONS, 1991, 79 (01) :57-59

[3] MASS ENHANCEMENT AND MAGNETIC ORDER AT THE MOTT-HUBBARD TRANSITION [J].

CARTER, SA ;

ROSENBAUM, TF ;

METCALF, P ;

HONIG, JM ;

SPALEK, J .

PHYSICAL REVIEW B, 1993, 48 (22) :16841-16844

[4] MAGNETIC AND TRANSPORT STUDIES OF PURE V2O3 UNDER PRESSURE [J].

CARTER, SA ;

ROSENBAUM, TF ;

LU, M ;

JAEGER, HM ;

METCALF, P ;

HONIG, JM ;

SPALEK, J .

PHYSICAL REVIEW B, 1994, 49 (12) :7898-7903

[5] C-13 NMR-STUDIES OF THE NORMAL AND SUPERCONDUCTING STATES OF THE ORGANIC SUPERCONDUCTOR KAPPA-(ET)(2)CU[N(CN)(2)]BR [J].

DESOTO, SM ;

SLICHTER, CP ;

KINI, AM ;

WANG, HH ;

GEISER, U ;

WILLIAMS, JM .

PHYSICAL REVIEW B, 1995, 52 (14) :10364-10368

[6]

GINSBERG DM, 1990, PHYSICAL PROPERTIES

[7] ELECTRON CORRELATIONS IN NARROW ENERGY BANDS .3. IMPROVED SOLUTION [J].

HUBBARD, J .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1964, 281 (1384) :401-+

[8]

Ishiguro T., 1998, ORGANIC SUPERCONDUCT

[9] NMR relaxation rate in the superconducting state of the organic conductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br [J].

Kanoda, K ;

Miyagawa, K ;

Kawamoto, A ;

Nakazawa, Y .

PHYSICAL REVIEW B, 1996, 54 (01) :76-79

[10] Recent progress in NMR studies on organic conductors [J].

Kanoda, K .

HYPERFINE INTERACTIONS, 1997, 104 (1-4) :235-249

← 1 2 3 4 →