Abstract
We investigate two-band superconductivity in ultrasmall grain. The Richardson’s exact solution is extended to two-band systems, and a new coupled equation is derived according to the procedure of Richardson’s works. Parity gap and condensation energy of ultrasmall two-band superconducting grain are numerically obtained by solving the coupled equations. We discuss these properties in ultrasmall grain in relation to the correlation, interband interaction, and size dependence.
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Kawabe, H., Nagao, H., Kruchinin, S.P. (2007). II.1 Magnesium diboride and the two-band scenario. In: Scharnberg, K., Kruchinin, S. (eds) Electron Correlation in New Materials and Nanosystems. NATO Science Series, vol 241. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-5659-8_11
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DOI: https://doi.org/10.1007/978-1-4020-5659-8_11
Publisher Name: Springer, Dordrecht
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