超导体 - 绝缘体量子相变中的自对偶性

Self-duality in superconductor-insulator quantum phase transitions.

作者信息

Schakel AM

机构信息

Low Temperature Laboratory, Helsinki University of Technology, P.O. Box 2200, FIN-02015 HUT, Finland and and Institut fur Theoretische Physik, Freie Universitat Berlin, Arnimallee 14, 14195 Berlin, Germany.

出版信息

Phys Rev Lett. 2000 Oct 30;85(18):3934-7. doi: 10.1103/PhysRevLett.85.3934.

DOI:10.1103/PhysRevLett.85.3934

PMID:11041964

Abstract

It is argued that close to a Coulomb interacting quantum critical point the interaction between two vortices in a disordered superconducting thin film separated by a distance r changes from logarithmic in the mean-field region to 1/r in the region dominated by quantum critical fluctuations. This gives support to the charge-vortex duality picture of the observed reflection symmetry in the current-voltage characteristics on both sides of the transition.

摘要

有人认为，在接近库仑相互作用量子临界点时，无序超导薄膜中相距为r的两个涡旋之间的相互作用，在平均场区域从对数形式变为在由量子临界涨落主导的区域中的1/r形式。这为转变两侧电流-电压特性中观察到的反射对称性的电荷-涡旋对偶图景提供了支持。