Lowfrequency response of a collectively pinned vortex manifold
Abstract
A lowfrequency dynamic response of a vortex manifold in a typeII superconductor can be associated with thermally activated tunneling of large portions of the manifold between pairs of metastable states. We suggest that statistical properties of these states can be verified by using the same approach for the analysis of thermal fluctuations the behavior of which is well known. The exponent describing the frequency dependence of a linear response is found for the generic case of a vortex manifold with nondispersive elastic moduli and also for the case of thin superconducting film in which the compressibility modulus is always nonlocal.
 Publication:

Physical Review B
 Pub Date:
 May 2001
 DOI:
 10.1103/PhysRevB.63.174514
 arXiv:
 arXiv:condmat/0007387
 Bibcode:
 2001PhRvB..63q4514K
 Keywords:

 74.60.Ge;
 74.76.w;
 74.25.Nf;
 Response to electromagnetic fields;
 Condensed Matter  Superconductivity;
 Condensed Matter  Statistical Mechanics
 EPrint:
 8 pages, no figures, ReVTeX, the final version. Text strongly modified, all the results unchanged