PRESSURE-INDUCED NESTING IN THE LOW-DIMENSIONAL ORGANIC SUPERCONDUCTOR ALPHA-(BEDT-TTF)2NH4HG(SCN)4

被引：23

作者：

KLEPPER, SJ

BROOKS, JS

CHEN, X

BRADARIC, I

TOKUMOTO, M

KINOSHITA, N

TANAKA, Y

AGOSTA, CC

机构：

[1] CLARK UNIV, WORCESTER, MA 01610 USA

[2] BOSTON UNIV, DEPT PHYS, BOSTON, MA 02215 USA

[3] VINCA INST, NEW IND MAT LAB, YU-11001 BELGRADE, YUGOSLAVIA

[4] ELECTROTECH LAB, TSUKUBA, IBARAKI 305, JAPAN

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.48.9913

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Why superconductivity appears in only one member (M = NH4) of the isostructural family of organic conductors alpha-(BEDT-TTF)2MHg(SCN)4 is a long-standing question. Others in the family (M = K,Rb,Tl) have density-wave ground states. To address this problem, we have studied pressure effects in superconducting alpha-(BEDT-TTF)2NH4Hg(SCN)4 (T(c) = 1.0 K). Our results show a remarkable pressure dependence of the Fermi surface topology. We argue that with NH4, there are small deviations from perfect nesting of the open-orbit bands which favor superconductivity over a density-wave state.

引用

页码：9913 / 9916

页数：4

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