Coherence lengths for superconductivity in the two-orbital negative-U Hubbard model

Details Coherence lengths for superconductivity in the two-orbital negative-U Hubbard model Coherence lengths for superconductivity in the two-orbital negative-U Hubbard model

2011-12-23

arxiv.org/abs/1112.5661v1

Physics

Condensed Matter

Superconductivity

5 pages, 3 figures, Acta Physica Polonica (2012) in press

Scientific paper

We study the peculiarities of coherency in the superconductivity of
two-orbital system. The superconducting phase transition is caused here by the
on-site intra-orbital attractions (negative-U Hubbard model) and inter-orbital
pair-transfer interaction. The dependencies of critical and noncritical
correlation lengths on interaction channels and band fillings are analyzed.

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