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Disordered Type-II Superconductors: A Universal Phase Diagram for Low-T$_c$ Systems

S. S. Banerjee·A. K. Grover·M. J. Higgins·G. I. Menon·P. K. Mishra·D. Pal·S. Ramakrishnan·T. V. C. Rao·G. Ravikumar·V. C. Sahni·S. Sarkar·C. V. Tomy
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Abstract

A universal phase diagram for weakly pinned low-T$_c$ type-II superconductors is revisited and extended with new proposals. The low-temperature ``Bragg glass'' phase is argued to transform first into a disordered, glassy phase upon heating. This glassy phase, a continuation of the high-field equilibrium vortex glass phase, then melts at higher temperatures into a liquid. This proposal provides an explanation for the anomalies observed in the peak effect regime of 2H-NbSe$_2$ and several other low-T$_c$ materials which is independent of the microscopic mechanisms of superconductivity in these systems.

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S. S. Banerjee, A. K. Grover, M. J. Higgins, G. I. Menon, P. K. Mishra, D. Pal, S. Ramakrishnan, T. V. C. Rao, G. Ravikumar, V. C. Sahni, S. Sarkar, C. V. Tomy. 2000-07-27. Disordered Type-II Superconductors: A Universal Phase Diagram for Low-T$_c$ Systems. https://doi.org/10.1016/s0921-4534(00)01767-6

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