A zero-temperature study of vortex mobility in two-dimensional vortex glass models
Department of Physics, Umeå University - 901 87
Corresponding author: email@example.com
Accepted: 9 August 2002
Three different vortex glass models are studied by examining the energy barrier against vortex motion across the system. In the two-dimensional gauge glass this energy barrier is found to increase logarithmically with system size which opens up for the existence of a low-temperature phase with zero resistivity. Associated with the large-energy barriers is a breaking of ergodicity which explains why the well-established results from equilibrium studies could fail. The behavior of the more realistic random pinning model is however different with decreasing energy barriers and no finite critical temperature.
PACS: 75.10.Nr – Spin-glass and other random models / 74.60.Ge – Flux pinning, flux creep, and flux-line lattice dynamics / 74.76.Bz – High- films
© EDP Sciences, 2002