Quantum tunneling of vortices in high-T-c superconducting cuprates

被引：0

作者：

Garcia, A ^{[1
]}

Zhang, XX ^{[1
]}

Tejada, J ^{[1
]}

Fiorani, D ^{[1
]}

Testa, AM ^{[1
]}

机构：

[1] CNR,IST CHIM MAT,I-00016 MONTEROTONDO,ROMA,ITALY

来源：

CZECHOSLOVAK JOURNAL OF PHYSICS | 1996年 / 46卷

关键词：

D O I：

10.1007/BF02562986

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Low-temperature magnetic relaxation experiments were performed in different Tl- and Hg-based high-temperature superconducting cuprates (HTSCs). The temperature dependence of the time-logarithmic, normalized relaxation rate R = \d(M/M(o))/dln(t)\ gives evidence of a crossover from thermally activated to quantum vortex motion as temperature decreases. In addition, the field dependence of R reflects a crossover in the dimensionality of the tunneling object, from 3D flux lines to 2D vortices as field increases. Both results are consistent one with each other and with theories of quantum vortex motion in HTSCs.

引用

页码：1743 / 1744

页数：2

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