Regime interpretation of anomalous vortex dynamics in 2D superconductors

被引：19

作者：

Capezzali, M ^{[1
]}

Beck, H ^{[1
]}

Shenoy, SR ^{[1
]}

机构：

[1] INT CTR THEORET PHYS,CONDENSED MATTER PHYS GRP,I-34100 TRIESTE,ITALY

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.78.523

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Low-frequency dynamic impedance [sigma(-1)(omega,T)=(sigma(1) + i sigma(2))(-1)] measurements on Josephson junction arrays found that sigma(1) similar to /In omega/, sigma(2) similar to const. This implies anomalously sluggish;vortex mobilities mu(V)(omega) similar to sigma(1)(-1), and is in conflict with general dynamical scaling expressions. We-calculate (a) sigma(omega,T) by real-space vortex.scaling and (b) mu(V)(omega) using Mori's formalism for a screened Coulomb gas. We find, in addition to the usual critical (large-omega) and hydrodynamic (low-omega) regimes, a new intermediate-frequency scaling regime into which the experimental data fall. This resolves the above mentioned conflict and makes explicit predictions for the scaling form of sigma(omega,T).

引用

页码：523 / 526

页数：4

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