Anisotropy of the upper critical field in superconductors with anisotropic gaps. Anisotropy parameters of MgB2

Abstract

The upper critical field Hc2 is evaluated for weakly-coupled two-band superconductors. By modeling the actual bands and the gap distribution of MgB2 by two Fermi surface spheroids with average parameters of the real material, we show that H_{c2,ab}/H_{c2,c} increases with decreasing temperature in agreement with available data.

4 pages, 2 figures

References in corpus (1)

• MgB2 single crystals: high pressure growth and anisotropic properties

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