NONLINEAR EFFECTS DURING VORTEX MOTION IN SUPERCONDUCTING FILMS OF ND1.85CE0.15CUOX

被引：12

作者：

DOETTINGER, SG

ANDERS, S

HUEBENER, RP

HAENSEL, H

OVCHINNIKOV, YN

机构：

[1] UNIV KARLSRUHE,INST THEOR KONDENSIERTEN MAT,D-76043 KARLSRUHE,GERMANY

[2] RUSSIAN ACAD SCI,LD LANDAU THEORET PHYS INST,MOSCOW 117901,RUSSIA

来源：

EUROPHYSICS LETTERS | 1995年 / 30卷 / 09期

关键词：

D O I：

10.1209/0295-5075/30/9/008

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

As predicted by Larkin and Ovchinnikov, in the low-temperature limit the flux-flow resistance of a type-II superconductor displays a logarithmic singularity at an electric current I-* which originates from the contraction of the vortex core first discussed by Kramer and Pesch and which is related to the critical pair-breaking current and the inelastic quasi-particle scattering rate tau(in)(-1). We report the first observation of this effect, performing our experiments with epitaxial c-axis-oriented films of Nd1.85Ce0.15CuOx. Near 1.6 K for the inelastic-scattering rate we obtained a value as low as tau(in)-1 = 1.7 . 10(9) s(-1).

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页码：549 / 554

页数：6

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