In-gap bound states induced by nonmagnetic impurities in two-band s± superconductors
نویسندگان
چکیده
The physics of single nonmagnetic impurity immersed in a two-band s-wave superconductor with relative phase 0 between its two order parameters is studied and elucidated. It is shown that midgap bound states are always induced by nonmagnetic impurities when = s -wave superconductors . These bound states emerge as a consequence of the topological nature of the corresponding Bogoliubov-de Gennes equation.
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تاریخ انتشار 2009