title: SU(4) Skyrmions in the ν=±1 Quantum Hall State of Graphene.
abstract: We explore different Skyrmion types in the lowest Landau level of graphene at a filling factor ν=±1. In addition to the formation of spin and valley pseudospin Skyrmions, we show that another type of spin-valley entangled Skyrmions can be stabilized in graphene due to an approximate SU(4) spin-valley symmetry that is affected by sublattice symmetry-breaking terms. These Skyrmions have a clear signature in spin-resolved density measurements on the lattice scale, and we discuss the expected patterns for the different Skyrmion types.
authors: Laboratoire de Physique des Solides, Univ. Paris-Sud, Université Paris-Saclay, CNRS, UMR 8502, F-91405 Orsay Cedex, France.
authors: Y
authors: Y
authors: Lian
authors: Institut für Theoretische Physik, Universität zu Köln, D-50937 Cologne, Germany.
authors: A
authors: A
authors: Rosch
authors: Laboratoire de Physique des Solides, Univ. Paris-Sud, Université Paris-Saclay, CNRS, UMR 8502, F-91405 Orsay Cedex, France.
authors: M O
authors: MO
authors: Goerbig