Journal
PHYSICAL REVIEW B
Volume 80, Issue 21, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.212504
Keywords
creep; critical currents; fluctuations in superconductors; Josephson effect; Kosterlitz-Thouless transition; mixed state; superconducting thin films
Funding
- U.S. Department of Energy Office of Science [DE-AC02-06CH11357]
- SFB [608]
- AvH Foundation
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We investigate the influence of quantum fluctuations and weak disorder on the vortex dynamics in a two-dimensional superconducting Berezinskii-Kosterlitz-Thouless system. The temperature below which quantum fluctuations dominate the vortex creep is determined and the transport in this quantum regime is described. The crossover from quantum to classical regime is discussed and the quantum correction to the classical current-voltage relation is determined. It is found that weak disorder can effectively reduce the critical current as compared to that in the clean system.
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