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In-gap bound states induced by nonmagnetic impurities in two-band s(+/-) superconductors

Authors Ng, T. K.
Avishai, Y.
Issue Date 2009
Source Physical Review B , v. 80, (10), 2009, SEP, article number 104504
Summary The physics of single nonmagnetic impurity immersed in a two-band s-wave superconductor with relative phase delta not equal 0 between its two order parameters is studied and elucidated. It is shown that midgap bound states are always induced by nonmagnetic impurities when delta = pi (s(+/-)-wave superconductors). These bound states emerge as a consequence of the topological nature of the corresponding Bogoliubov-de Gennes equation.
ISSN 1098-0121
Rights Physical Review B © copyright (2009) American Physical Society. The Journal's web site is located at
Language English
Format Article
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