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Superconducting gap renormalization around two magnetic impurities: From Shiba to Andreev bound states

Meng, T. and Klinovaja, J. and Hoffman, S. and Simon, P. and Loss, D.. (2015) Superconducting gap renormalization around two magnetic impurities: From Shiba to Andreev bound states. Physical Review B, 92 (6). 064503.

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Official URL: http://edoc.unibas.ch/40421/

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Abstract

We study the renormalization of the gap of an s-wave superconductor in the presence of two magnetic impurities. For weakly bound Shiba states, we analytically calculate the part of the gap renormalization that is sensitive to the relative orientation of the two impurity spins. For impurities with a strong exchange coupling to the conduction electrons, we solve the gap equation self-consistently by numerics and find that the subgap Shiba state turns into a supragap Andreev state when the local gap parameter changes sign under the impurities.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik Mesoscopics (Loss)
UniBasel Contributors:Loss, Daniel and Klinovaja, Jelena
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
ISSN:2469-9950
e-ISSN:2469-9969
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:10 May 2017 10:40
Deposited On:09 May 2016 11:29

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