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Superconducting ord...
Superconducting order parameter π-phase shift in magnetic impurity wires
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- Björnson, Kristofer (author)
- Uppsala universitet,Materialteori
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- Balatsky, Alexander V. (author)
- KTH,Stockholms universitet,Nordiska institutet för teoretisk fysik (Nordita),os Alamos National Laboratory, United States; ETH Institute for Theoretical Studies, Switzerland,Nordic Institute for Theoretical Physics NORDITA
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- Black-Schaffer, Annica M. (author)
- Uppsala universitet,Materialteori
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(creator_code:org_t)
- American Physical Society, 2017
- 2017
- English.
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In: Physical Review B. - : American Physical Society. - 2469-9950 .- 2469-9969. ; 95:10
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Abstract
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- It has previously been found that a magnetic impurity in a conventional s-wave superconductor can give rise to a local π-phase shift of the superconducting order parameter. By studying a finite wire of ferromagnetic impurities, we are able to trace the origin of the π-phase shift to a resonance condition for the Bogoliubov-de Gennes quasiparticle states. When non-resonating states localized at the impurity sites are pulled into the condensate for increasing magnetic strength, the superconducting order parameter is reduced in discrete steps, eventually resulting in a π-phase shift. We also show that for a finite spin-orbit coupling, the π-phase shift is preserved and occurs in a large portion of the topologically non-trivial phase.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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