| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9841781 | Physica C: Superconductivity and its Applications | 2005 | 6 Pages |
Abstract
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 two kinds of density of state: constant and van Hove singularity. The paring interaction in each band consisted of two parts: the electron-phonon interaction and non-electron-phonon interaction are included in our model. We find that the interband interaction of electron-phonon show more effect on isotope exponent than the intraband interaction and the isotope effect exponent with constant density of state can fit to experimental data, MgB2 and high-Tc superconductor, better than van Hove singularity density of state.
Related Topics
Physical Sciences and Engineering
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Condensed Matter Physics
Authors
P. Udomsamuthirun, C. Kumvongsa, A. Burakorn, P. Changkanarth, S. Yoksan,