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Phase diagram of vortex matter of type-II superconductors

By X.B. Xu, H. Fangohr, S.Y. Ding, F. Zhou, X.N. Xu, Z.H. Wang, M. Gu, D.Q. Shi and S.X. Dou

Abstract

We propose a model to construct the phase diagram for type-II superconductors through molecular-dynamics simulation. In this model, the Abrikosov vortices interact with long-range repulsion and short-range attraction. We are able to obtain the phase diagrams consisting of the vortex lattice, the intermediate-mixed phase (IMP), and the disordered vortex phase in the B-T, B-?, and B-q planes, where B is induction, ? is the Ginzburg-Landau parameter, and q is the relative strength of the attraction to repulsion interactions between vortices. The IMP is in the form of a superlattice of either vortex bubbles or parallel vortex stripes, agreeing excellently with experimental results that have not yet been explained by existing models.<br/><br/

Topics: QC
Year: 2011
OAI identifier: oai:eprints.soton.ac.uk:172475
Provided by: e-Prints Soton

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