Phys. Rev. Lett. 63, 2303–2306 (1989)Theory of collective flux creepReceived 3 May 1989; published in the issue dated 13 November 1989 The nature of flux-creep phenomena in the case of collective pinning by weak disorder is discussed. The Anderson concept of flux bundle is explored and developed. The dependence of the bundle activation barrier, U, on current j is studied and is shown to be of power-law type: U(j)∝j-α. The values of exponent α for the different regimes of collective creep are found. © 1989 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.63.2303
DOI:
10.1103/PhysRevLett.63.2303
PACS:
74.60.Ge, 74.60.Jg
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