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Probing unconventional superconductivity in proximitized graphene by impurity scattering
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
2018 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 97, no 21, article id 214515Article in journal (Refereed) Published
Abstract [en]

We demonstrate how potential impurities are a very powerful tool for determining the pairing symmetry in graphene, proximity coupled to a spin-singlet superconductor. All d-wave states are characterized by subgap resonances, with spatial patterns clearly distinguishing between nodal and chiral d-wave symmetry, while s-wave states have no subgap resonances. We also find strong supergap impurity resonances associated with the normal state Dirac point. Subgap and supergap resonances only interact at very low doping levels, then causing suppression of the supergap resonances.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2018. Vol. 97, no 21, article id 214515
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-358514DOI: 10.1103/PhysRevB.97.214515ISI: 000435544500003OAI: oai:DiVA.org:uu-358514DiVA, id: diva2:1244622
Funder
Swedish Research Council, 621-2014-3721Swedish Foundation for Strategic Research Knut and Alice Wallenberg FoundationGöran Gustafsson Foundation for Research in Natural Sciences and MedicineAvailable from: 2018-09-03 Created: 2018-09-03 Last updated: 2018-09-03Bibliographically approved

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Awoga, OladunjoyeBlack-Schaffer, Annica M.

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