Publication: Effect of density of state on isotope effect exponent of two-band superconductors
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Issued Date
2005
Resource Type
File Type
application/pdf
ISSN
9214534
Other identifier(s)
2-s2.0-24144433864
Rights Holder(s)
Scopus
Bibliographic Citation
Physica C: Superconductivity and its Applications. Vol 425, (2005), p.149-154
Suggested Citation
Udomsamuthirun P., Kumvongsa C., Burakorn A., Changkanarth P., Yoksan S. Effect of density of state on isotope effect exponent of two-band superconductors. Physica C: Superconductivity and its Applications. Vol 425, (2005), p.149-154. doi:10.1016/j.physc.2005.07.001 Retrieved from: https://hdl.handle.net/20.500.14740/6076
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. © 2005 Elsevier B.V. All rights reserved.