Dynamical fluctuation of the order parameter and diamagnetism of superconductors. I. Dirty limit
Tóm tắt
Limiting ourselves to dirty superconductors, we study theoretically the fluctuation-induced diamagnetism above the superconducting transition. We find that the dynamical fluctuation is extremely important except in the immediate vicinity of the transition region [i.e.,T℞T
c(H) orH℞H
c2(T), whereH
c2 is the upper critical field] and that this contribution does account for a large discrepancy between previous calculations and the recent experiment by Gollub, Beasley, and Tinkham.
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