Topological Order in the Vortex Glass Phase

of High-Temperature Superconductors

Jan Kiefeld, Thomas Nattermann, and Terence Hwa


        The stability of a vortex glass phase with quasi-long-range positional order is examined for a disordered layered superconductor. The role of topological defects is investigated using a scaling argument supplemented by a variational calculation. The results indicate that topological order is preserved for some range of parameters in the vortex glass phase. The stability regime is given in terms of a simple Lindemann-like criterion and is consistent with recent experiments.

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