Influence of interband interaction on Isotope Effect Exponent of MgB2 Superconductors

Details Influence of interband interaction on Isotope Effect Exponent of MgB2 Superconductors Influence of interband interaction on Isotope Effect Exponent of MgB2 Superconductors

2004-06-22

arxiv.org/abs/cond-mat/0406496v1

Physics

Condensed Matter

Superconductivity

10 pages, 2 figures. submit to Physica Status Solidi (b)

Scientific paper

The exact formula of Tc's equation and the isotope effect exponent of two-band s-wave superconductors in weak-coupling limit are derived by considering the influence of interband interaction. The paring interaction in each band consisted of 2 parts : the electron-phonon interaction and non-phonon interaction are included in our model. The isotope effect exponent of MgB2 equal to 0.3 with Tc 40 K can be found in the weak coupling regime and interband interaction of electron-phonon interaction show more effect on isotope effect exponent than of non-phonon interaction.

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