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arXiv · 1709.02491

Pair-breaking of multi-gap superconductivity under parallel magnetic fields in electric-field-induced surface metallic state

Masahiro Nabeta·Kenta K. Tanaka·Seiichiro Onari·Masanori Ichioka
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Abstract

Roles of paramagnetic and diamagnetic pair-breaking effects in superconductivity in electric-field-induced surface metallic state are studied by Bogoliubov-de Gennes equation, when magnetic fields are applied parallel to the surface. The multi-gap states of sub-bands are related to the depth dependence and the magnetic field dependence of superconductivity. In the Fermi-energy density of states and the spin density, sub-band contributions successively appear from higher-level sub-bands with increasing magnetic fields. The characteristic magnetic field dependence may be a key feature to identify the multi-gap structure of the surface superconductivity.

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Masahiro Nabeta, Kenta K. Tanaka, Seiichiro Onari, Masanori Ichioka. 2017-09-08. Pair-breaking of multi-gap superconductivity under parallel magnetic fields in electric-field-induced surface metallic state. https://doi.org/10.1103/physrevb.96.094522

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