Nonlocal conductivity in the vortex-liquid regime of a two-dimensional superconductor

Rachel Wortis; David A. Huse

doi:10.1103/PhysRevB.54.12413

← Back to search

Nonlocal conductivity in the vortex-liquid regime of a two-dimensional superconductor

Rachel Wortis, David A. Huse

DOI 10.1103/PhysRevB.54.12413 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

We have simulated the time-dependent Ginzburg-Landau equation with thermal fluctuations, to study the nonlocal dc conductivity of a superconducting film. Having examined points in the phase diagram at a wide range of temperatures and fields below the mean field upper critical field, we find a portion of the vortex-liquid regime in which the nonlocal Ohmic conductivity in real space is negative over a distance several times the spacing between vortices. The effect is suppressed when driven beyond linear response. Earlier work had predicted the existence of such a regime, due to the high viscosity of a strongly correlated vortex liquid. This behavior is clearly distinguishable from the monotonic spatial falloff of the conductivity in the higher-temperature or field regimes approaching the normal state. The possibilities for experimental study of the nonlocal transport properties are discussed. © 1996 The American Physical Society.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown