Chiral d-wave superconductivity in doped graphene
2014 (English)In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 26, no 42, 423201- p.Article, review/survey (Refereed) Published
A highly unconventional superconducting state with a spin-singlet d(x2-y2) +/- id(xy)-wave, or chiral d-wave symmetry has recently been suggested to emerge from electron-electron interactions in doped graphene. It has been argued that graphene doped to the van Hove singularity at 1/4 doping, where the density of states diverge, is particularly likely to be a chiral d-wave superconductor. In this review we summarize the currently mounting theoretical evidence for the existence of a chiral d-wave superconducting state in graphene, obtained with methods ranging from mean-field studies of effective Hamiltonians to angle-resolved renormalization group calculations. We further discuss the multiple distinctive properties of the chiral d-wave superconducting state in graphene, as well as its stability in the presence of disorder. We also review the means of enhancing the chiral d-wave state using proximity-induced superconductivity. The appearance of chiral d-wave superconductivity is intimately linked to the hexagonal crystal lattice and we also offer a brief overview of other materials which have also been proposed to be chiral d-wave superconductors.
Place, publisher, year, edition, pages
2014. Vol. 26, no 42, 423201- p.
graphene, dopants, superconductivity, topological
IdentifiersURN: urn:nbn:se:uu:diva-237646DOI: 10.1088/0953-8984/26/42/423201ISI: 000343423800001PubMedID: 25238054OAI: oai:DiVA.org:uu-237646DiVA: diva2:769146