Reentrant behavior of the phase stiffness in Josephson junction arrays

Preprint

17 November 2003

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0306291

Abstract

The phase diagram of a 2D Josephson junction array with large substrate resistance, described by a quantum XY model, is studied by means of Fourier path-integral Monte Carlo. A genuine Berezinskii-Kosterlitz-Thouless transition is found up to a threshold value g* of the quantum coupling, beyond which no phase coherence is established. Slightly below g* the phase stiffness shows a reentrant behavior with temperature, in connection with a low-temperature disappearance of the superconducting phase, driven by strong nonlinear quantum fluctuations.

Keywords

JOSEPHSON JUNCTION ARRAY
REENTRANT BEHAVIOR
ARRAYS THE PHASE
PHASE STIFFNESS
JUNCTION ARRAYS
TEMPERATURE
RESISTANCE

All Related Versions

Version 1, 2003-06-11, ArXiv
Version 2, 2003-11-17, ArXiv
Published version: Physical Review Letters, 91 (24), 247004.

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