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Barth, Michael ; Fuchs, Jacob ; Kochan, Denis

Spin relaxation, Josephson effect and Yu-Shiba-Rusinov states in superconducting bilayer graphene

Barth, Michael , Fuchs, Jacob and Kochan, Denis (2022) Spin relaxation, Josephson effect and Yu-Shiba-Rusinov states in superconducting bilayer graphene. Physical Review B 105 (20), p. 205409.

Date of publication of this fulltext: 16 May 2022 07:00
Article
DOI to cite this document: 10.5283/epub.52283


Abstract

Bilayer graphene has two nonequivalent sublattices and, therefore, the same adatom impurity can manifest in spectrally distinct ways???sharp versus broad resonances near the charge neutrality???depending on the sublattice it adsorbs at. Employing Green???s function analytical methods and the numerical KWANT package, we investigate the spectral and transport interplay between the resonances and ...

Bilayer graphene has two nonequivalent sublattices and, therefore, the same adatom impurity can manifest in spectrally distinct ways???sharp versus broad resonances near the charge neutrality???depending on the sublattice it adsorbs at. Employing Green???s function analytical methods and the numerical KWANT package, we investigate the spectral and transport interplay between the resonances and superconducting coherence induced in bilayer graphene by proximity to an s-wave superconductor. Analyzing doping and temperature dependencies of quasiparticle spin-relaxation rates, energies of Yu-Shiba-Rusinov states, Andreev spectra, and the supercurrent characteristics of Josephson junctions, we find unique superconducting signatures discriminating between resonant and off-resonant regimes. Our findings are in certain aspects going beyond the superconducting bilayer graphene and hold for generic s-wave superconductors functionalized by the resonant magnetic impurities.



Involved Institutions


Details

Item typeArticle
Journal or Publication TitlePhysical Review B
Publisher:AMER PHYSICAL SOC
Open Access Type:Due to SHERPA/RoMEO
Place of Publication:COLLEGE PK
Volume:105
Number of Issue or Book Chapter:20
Page Range:p. 205409
Date5 May 2022
InstitutionsPhysics > Institute of Theroretical Physics
Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Klaus Richter
Identification Number
ValueType
10.1103/PhysRevB.105.205409DOI
2110.12998arXiv ID
KeywordsBAND-STRUCTURE; JUNCTIONS; SPECTRUM; FIELD
Dewey Decimal Classification500 Science > 530 Physics
StatusPublished
RefereedYes, this version has been refereed
Created at the University of RegensburgPartially
URN of the UB Regensburgurn:nbn:de:bvb:355-epub-522831
Item ID52283

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