NEGATIVE LOCAL SUPERFLUID DENSITIES - THE DIFFERENCE BETWEEN DIRTY SUPERCONDUCTORS AND DIRTY BOSE LIQUIDS

被引:236
作者
SPIVAK, BI
KIVELSON, SA
机构
[1] Department of Physics, University of California at Los Angeles, Los Angeles
来源
PHYSICAL REVIEW B | 1991年 / 43卷 / 04期
关键词
D O I
10.1103/PhysRevB.43.3740
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We show that in a disordered superconductor near the superconductor-to-insulator transition, the local superfluid density N(s) fluctuates from point to point in sign as well as magnitude. We demonstrate this explicitly with a simple model in which correlation effects produce a negative Josephson coupling between two superconducting grains. We argue more generally that both correlation effects and resistance fluctuations will produce random signs of N(s). This implies that a disordered superconductor is more like a quantum XY spin glass than a disordered Bose liquid.
引用
收藏
页码:3740 / 3743
页数:4
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