Shape and motion of vortex cores in Bi2Sr2CaCu2O8+δ

被引：29

作者：

Hoogenboom, BW

Kugler, M

Revaz, B

Maggio-Aprile, I

Fischer, O

Renner, C

机构：

[1] Univ Geneva, Dept Phys Mat Condensee, CH-1211 Geneva 4, Switzerland

[2] NEC Res Inst, Princeton, NJ 08540 USA

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.62.9179

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a detailed study on the behavior of vortex cores in Bi2Sr2CaCu2O8+delta using scanning tunneling spectroscopy. The very irregular distribution and shape of the vortex cores imply a strong pinning of the vortices by defects and inhomogeneities. The observed vortex cores seem to consist of two or more randomly distributed smaller elements. Even more striking is the observation of vortex motion where the vortex cores are divided between two positions before totally moving from one position to the other. Both effects can be explained by quantum tunneling of vortices between different pinning centers.

引用

页码：9179 / 9185

页数：7

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