Effects of quantum and thermal fluctuations on collective pinning and critical current density in type-II superconducting bulk materials

Ming Ju Chou, Herng Er Horng

研究成果: 雜誌貢獻期刊論文同行評審

摘要

The effects of quantum and thermal fluctuations on collective pinning and critical current density Jc are investigated for bulk type-II superconductors by utilizing quantum statistics. It is shown that for a constant magnetic field, Jc is nearly independent of temperature in the quantum limit; however, in the classical limit, Jc decreases weakly with increasing temperature when T < Tdp (depinning temperature); when Tdp < T < Tf (boundary fluctuation temperature), Jc is power-law-decaying, and when T > T f, Jc decays exponentially. For constant temperature, Jc first decreases, then increases after reaching a maximum, and finally decreases again. These results are in agreement with the experiments.

原文英語
頁(從 - 到)609-618
頁數10
期刊International Journal of Modern Physics B
25
發行號4
DOIs
出版狀態已發佈 - 2011 2月 10

ASJC Scopus subject areas

  • 統計與非線性物理學
  • 凝聚態物理學

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