Pinning, Jamming, Shaking and Flow : Statics and Dynamics of Disordered Vortex Phases
Abstract
Disordered vortex phases in type-II superconductors display a rich variety of pinned and moving phases and phase transformations both in equilibrium and away from it. The occurrence and stability of these phases and transitions among them are tuned by the competition among inter-vortex interaction, random disorder (pinning), thermal fluctuations and, in the case of dynamics, the external drive. Recent experimental studies suggest that "plasticity" of vortex matter plays an important role in both the statics and the dynamics of soft vortex matter. It yields a variety of unusual phenomena such as a sudden drop in vortex mobility as in "jamming" (the "peak effect"), switching between high mobility and low mobility states, shaking-induced ordering and an overall history-dependent response as in glassy systems indicating the presence of strong metastability in well-defined parts of the phase diagram. In collaboration with M. Higgins, NECI; S. Banerjee, S. Sarkar, A.Grover and S. Ramakrishnan, TIFR, Mumbai; G. Ravikumar, T.V.C. Rao, P. Mishra and V. Sahni, BARC, Mumbai; C. Thomy, IIT, Mumbai and D. MckPaul, University of Warwick, UK.
- Publication:
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APS March Meeting Abstracts
- Pub Date:
- March 2000
- Bibcode:
- 2000APS..MAR.Y4005B