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Low Temperature Upper Critical Field Anomalies in Clean Superconductors

Gabriel Kotliar·Chandra Varma
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Abstract

We interpret the upper-critical-field anomalies observed in some high- temperature superconductors as resulting from the proximity to a zero-temperature quantum critical point. We estimate the shape of the phase boundary between the normal and the superconducting phase by modeling the zero temperature critical point as the second-order endpoint of the first-order melting line of the vortex lattice.

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Gabriel Kotliar, Chandra Varma. 1996-07-24. Low Temperature Upper Critical Field Anomalies in Clean Superconductors. https://doi.org/10.1103/physrevlett.77.2296

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