Abstract
A two-band scheme of the MgB2 superconductivity has been developed. The pairing channels incorporate σ-intraband electron–phonon attraction besides the Coulombic repulsion, together with pair transfer between effective σ- and π-bands. Various MgB2 superconducting characteristics calculated using a plausible parameter set (which is narrower than the amount of considered properties) agree on a quantitative level with the observations.
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Kristoffel, N., Örd, T. & Rägo, K. A Description of MgB2 Superconductivity Including σ–π Bands Coupling. Journal of Superconductivity 16, 517–519 (2003). https://doi.org/10.1023/A:1023821104561
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DOI: https://doi.org/10.1023/A:1023821104561