Quasi-particle lifetime broadening in normal-superconductor junctions with UPt3

被引：28

作者：

deWilde, Y

Klapwijk, TM

Jansen, AGM

Heil, J

Wyder, P

机构：

[1] MPI,CNRS,HIGH FIELD MAGNET LAB,F-38042 GRENOBLE,FRANCE

[2] ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439

[3] UNIV GRONINGEN,DEPT APPL PHYS,9700 AB GRONINGEN,NETHERLANDS

[4] UNIV GRONINGEN,CTR MAT SCI,9700 AB GRONINGEN,NETHERLANDS

来源：

PHYSICA B | 1996年 / 218卷 / 1-4期

关键词：

D O I：

10.1016/0921-4526(95)00584-6

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

For the Andreev-reflection process of quasi-particles at a normal-metal-superconductor interface the influence of lifetime broadening of the quasi-particles on the current-voltage characteristics of NS point contacts is analyzed along the lines of the Blonder-Tinkham-Klapwijk model. The anomalous Andreev-reflection spectra obtained for the heavy-fermion compound UPt3 cannot be explained by lifetime broadening alone. Instead, an anisotropic superconducting order parameter has to be assumed which, if also lifetime broadening is included, leads to a fairly good agreement with the data.

引用

页码：165 / 168

页数：4

共 9 条

[1] TRANSITION FROM METALLIC TO TUNNELING REGIMES IN SUPERCONDUCTING MICRO-CONSTRICTIONS - EXCESS CURRENT, CHARGE IMBALANCE, AND SUPER-CURRENT CONVERSION [J].