Frequency Dependence of Optical Conductivity in MgB2 Superconductor


Using Green’s function method, the frequency dependence of optical conductivities of high-quality MgB2 film is calculated in the framework of the single- and two-band model. By comparing the numerical and experimental results, it is shown that the single-gap isotropic model is insufficient to understand consistently optical behaviors. Also, it is concluded that the two-band model consistently describes the optical behaviors. In the two-gap model, we consider that the both components of optical conductivity are a weighted sum of the contribution from σ and π bonds and hybridization between them is negligible.

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Shojaei, A. , Moarrefi-Romeileh, M. and Joata-Bayrami, A. (2015) Frequency Dependence of Optical Conductivity in MgB2 Superconductor. World Journal of Condensed Matter Physics, 5, 353-360. doi: 10.4236/wjcmp.2015.54036.

Conflicts of Interest

The authors declare no conflicts of interest.


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