Unconventional Superconductivity in MgCNi3

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A multiband superconductor with a conventional phonon mechanism can develop an unconventional state with a nontrivial order parameter phase relation between the individual bands. We propose that such a state can explain recent experimental results on MgCNi3, which are suggestive of both s-wave pairing symmetry and of unconventional superconductivity. We show that such a state gives rise to Andreev bound states, and to spontaneous currents, at surfaces and around impurities. We also investigate possible phase transitions between states with different order parameter symmetry.
4 pages

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Superconductivity

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http://salesiana.dossiersoluciones.com/handle/123456789/19805

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0208367
 http://arxiv.org/abs/cond-mat/0208367

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arXiv