Anisotropic critical fields of MgB2 single crystals

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The recently discovered superconductivity in MgB2 has created the world sensation. In spite of the relatively high superconducting transition temperature Tc=39K, the superconductivity is understood in terms of rare two gap superconductor with energy gaps attached to the sigma- and pi-band. However, this simple model cannot describe the temperature dependent anisotropy in H_c2 or the temperature dependence of the anisotropic magnetic penetration depth. Here we propose a model with two anisotropic energy gaps with different shapes. Indeed the present model describes a number of pecularities of MgB2 which have been revealed only recently through single crystal MgB2.
4 pages, 1 figure, to appear in Acta Physica Polonica B, proceedings of the International Conference on Strongly Correlated Electron Systems, SCES2002, Krakow, Poland

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Superconductivity

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http://salesiana.dossiersoluciones.com/handle/123456789/19654

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0207521
 http://arxiv.org/abs/cond-mat/0207521
 Acta Physica Polonica B 34, 549 (2003)

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arXiv