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

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

2002-07-05

arxiv.org/abs/cond-mat/0207146v1

J. Phys. Soc. Jpn. 72, 221 (2003).

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures

Scientific paper

10.1143/JPSJ.72.221

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.

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