POINT-CONTACT SPECTROSCOPY ON THE HEAVY-FERMION SUPERCONDUCTOR UPT3

被引：15
|
作者：
GOLL, G
VONLOHNEYSEN, H
YANSON, IK
TAILLEFER, L
机构：
[1] ACAD SCI,INST LOW TEMP PHYS ENGN,10164 KHARKOV,UKRAINE
[2] MCGILL UNIV,DEPT PHYS,MONTREAL H3A 2T8,QUEBEC,CANADA
来源：
PHYSICA B | 1994年 / 199卷
关键词：
D O I：
10.1016/0921-4526(94)91751-5
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Point-contact spectroscopy has been used to study the superconducting properties of the heavy-fermion system UPt3 down to about 40 mK. The differential resistance of heterocontacts between UPt3 and Pt shows, for current flow parallel to the c direction, a distinct minimum at a low bias due to Andreev reflection. From the temperature and magnetic-field dependence of this structure, we infer that Andreev reflection is observable only in the low-temperature, low-magnetic-field phase of this unconventional superconductor, giving clear evidence of different order parameters in the different superconducting phases.
引用
收藏
页码：110 / 112
页数：3
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