Nonlinear current response of one- and two-band superconductors

Details Nonlinear current response of one- and two-band superconductors Nonlinear current response of one- and two-band superconductors

2005-10-10

arxiv.org/abs/cond-mat/0510250v1

Phys. Rev. B vol 73, 014521 (2006)

Physics

Condensed Matter

Superconductivity

10 pages, 6 figures

Scientific paper

10.1103/PhysRevB.73.014521

We have calculated the nonlinear current of a number of single band s-wave electron-phonon superconductors. Among issues considered were those of dimensionality, strong electron-phonon coupling, impurities, and comparison with BCS. For the case of two bands, particular attention is paid to the role of anisotropy, the integration effects of the off-diagonal electron-phonon interaction, as well as inter- and intraband impurities. For the specific case of MgB2, we present results based on the known microscopic parameters of band theory.

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