Pressure effect on superconductivity in CeCoIn5-xSnx studied by thermal expansion

被引：5

作者：

Donath, J. G. ^{[1
]}

Gegenwart, P.

Kuechler, R.

Oeschler, N.

Steglich, F.

Bauer, E. D.

Sarrao, J. L.

机构：

[1] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

[2] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

PHYSICA B-CONDENSED MATTER | 2006年 / 378-80卷

关键词：

CeCoIn5; heavy fermion superconductivity; quantum critical point;

D O I：

10.1016/j.physb.2006.01.039

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We present low-temperature thermal expansion measurements on the Sn-substituted heavy fermion superconductor CeCoIn5-xSnx for 0 <= x <= 0. 12 in which T-c is rapidly suppressed from 2.3 (x = 0) to 0. 7 K (x = 0. 12). The analysis of the superconducting transition anomalies reveals a drastic change of the uniaxial pressure dependences of T-c with Sn substitution. The hydrostatic pressure dependence of T-c is positive for Sn concentrations x <= 0.06 and changes sign at larger x. A first-order superconducting transition, caused by Pauli limiting in magnetic fields that suppress T-c to below 0.7K, is visible at x <= 0.06. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：98 / 99

页数：2

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