Anisotropy of the superconducting energy gap in URu2Si2 studied by point-contact spectroscopy

被引：20

作者：

Naidyuk, YG

vonLohneysen, H

Goll, G

Yanson, IK

Menovsky, AA

机构：

[1] UKRAINIAN ACAD SCI,INST LOW TEMP PHYS & ENGN,KHARKOV 310164,UKRAINE

[2] UNIV AMSTERDAM,VAN DER WAALS ZEEMAN LAB,1018 XE AMSTERDAM,NETHERLANDS

来源：

EUROPHYSICS LETTERS | 1996年 / 33卷 / 07期

关键词：

D O I：

10.1209/epl/i1996-00378-5

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The differential resistance dV/dI vs. applied voltage V for URu(?)2Si(2)-normal-metal point-contacts (PCs) is investigated. For some PCs a clear double-minimum structure is observed in dV/dI vs. V at zero bias well below the superconducting critical temperature T-c as expected for the Andreev reflection. The double minimum occurs only for PCs with suppressed antiferromagnetic (AF) features in dV/dI, in support of a recent model of the gap depression by AF order in the (a, b)-plane of tetragonal URu2Si2. A strong anisotropy of the reduced gap 2 Delta/kT(c) and of B-c2 for PCs along the a and the c axis is also observed.

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收藏

页码：557 / 562

页数：6

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