Topological superconductivity in two dimensions with mixed chirality
2015 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 92, no 14, 140503Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2015. Vol. 92, no 14, 140503
IdentifiersURN: urn:nbn:se:uu:diva-266696DOI: 10.1103/PhysRevB.92.140503ISI: 000362896700002OAI: oai:DiVA.org:uu-266696DiVA: diva2:868888
FunderSwedish Research CouncilGöran Gustafsson Foundation for promotion of scientific research at Uppala University and Royal Institute of TechnologySwedish Foundation for Strategic Research