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Topological superconductivity in two dimensions with mixed chirality
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Materialteori.
Ecole Polytech, CNRS, Ctr Phys Theor, F-91128 Palaiseau, France..
2015 (engelsk)Inngår i: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 92, nr 14, artikkel-id 140503Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We find a mixed chirality d-wave superconducting state in the coexistence region between antiferromagnetism and interaction-driven superconductivity in lightly doped honeycomb materials. This state has a topological chiral d + id-wave symmetry in one Dirac valley but d - id-wave symmetry in the other valley and hosts two counterpropagating edge states, always protected in the absence of intervalley scattering. A first-order topological phase transition, with no bulk gap closing, separates the chiral d-wave state at small magnetic moments from the mixed chirality d-wave phase.

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2015. Vol. 92, nr 14, artikkel-id 140503
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URN: urn:nbn:se:uu:diva-266696DOI: 10.1103/PhysRevB.92.140503ISI: 000362896700002OAI: oai:DiVA.org:uu-266696DiVA, id: diva2:868888
Forskningsfinansiär
Swedish Research CouncilGöran Gustafsson Foundation for promotion of scientific research at Uppala University and Royal Institute of TechnologySwedish Foundation for Strategic Research Tilgjengelig fra: 2015-11-12 Laget: 2015-11-10 Sist oppdatert: 2017-12-01bibliografisk kontrollert

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