Phys. Rev. B 80, 212504 (2009) [4 pages]Transport properties of clean and disordered Josephson-junction arraysReceived 14 October 2009; revised 27 November 2009; published 30 December 2009 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. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.80.212504
DOI:
10.1103/PhysRevB.80.212504
PACS:
74.81.Fa, 74.25.Fy, 74.78.-w
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.