ANISOTROPY OF POINT-CONTACT SPECTRA IN THE HEAVY-FERMION SUPERCONDUCTOR UPT3

被引：86

作者：

GOLL, G

VONLOHNEYSEN, H

YANSON, IK

TAILLEFER, L

机构：

[1] MCGILL UNIV,DEPT PHYS,MONTREAL H3A 2T8,QUEBEC,CANADA

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

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.70.2008

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The heavy-fermion superconductor UPt3 has been studied in the superconducting state down to 36 mK by point-contact spectroscopy. Distinct minima in the differential resistance dV/dI versus voltage V related to the energy gap are observed for current flow parallel to the crystallographic c axis, while for current flow within the basal plane such features were almost always absent. This difference, together with a comparison of the Blonder-Tinkham-Klapwijk theory, gives clear evidence for a strong gap anisotropy. This is further supported by the unusual temperature and magnetic-field dependence of the spectra.

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页码：2008 / 2011

页数：4

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