Paramagnetic and diamagnetic pair-breaking effect in electric-field-induced surface superconductivity under parallel magnetic fields

29th International Symposium on Superconductivity

Ichioka, Masanori^1,2 ; Nabeta, Masahiro^1 ; Tanaka, Kenta K.^1 ; Onari, Seiichiro^1,2

Department of Physics, Okayama University, Okayama

700-8530, Japan^1

Research Institute for Interdisciplinary Science (RIIS), Okayama University, Okayama

700-8530, Japan^2

关键词: Bogoliubov-de Gennes equations;    Depth dependence;    Electric field induced;    Pair breaking effect;    Parallel magnetic field;    Paramagnetic moment;    Screening current;    Surface superconductivity;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/871/1/012001/pdf
DOI  :  10.1088/1742-6596/871/1/012001

来源: IOP

【 摘 要 】

Electric-field-induced surface superconductivity is studied by Bogoliubov-de Gennes equation under magnetic fields parallel to the surface. We estimate the pair-breaking effects by the paramagnetic Zeeman shift and by diamagnetic screening current. We find that the depth dependences of pair potential, screening current, spin current, and paramagnetic moment under the magnetic fields reflect the multi-gap superconductivity in the sub-band structure.