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Title: In-gap bound states induced by nonmagnetic impurities in two-band s± superconductors
Authors: Avishai, Yshai
Ng, Tai-Kai
Keywords: Two-band s-wave superconductors
Multigap superconductors
Nonmagnetic impurities
Issue Date: 1-Sep-2009
Citation: Physical review B, v. 80, iss. 10, 104504, 1 September 2009
Abstract: 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.
Rights: Physical Review B © copyright (2009) American Physical Society. The Journal's web site is located at
Appears in Collections:PHYS Journal/Magazine Articles

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