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In-gap bound states induced by nonmagnetic impurities in two-band s± superconductors

Authors Ng, Tai Kai
Avishai, Yshai
Issue Date 2009
Source Physical Review B, v. 80, (10), September 2009, article number 104504
Summary The physics of single nonmagnetic impurity immersed in a two-band s-wave superconductor with relative phase δ≠0 between its two order parameters is studied and elucidated. It is shown that midgap bound states are always induced by nonmagnetic impurities when δ=π (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 © 2009 American Physical Society
Language English
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