title: Cubic topological Kondo insulators.
abstract: Current theories of Kondo insulators employ the interaction of conduction electrons with localized Kramers doublets originating from a tetragonal crystalline environment, yet all Kondo insulators are cubic. Here we develop a theory of cubic topological Kondo insulators involving the interaction of Γ(8) spin quartets with a conduction sea. The spin quartets greatly increase the potential for strong topological insulators, entirely eliminating the weak topological phases from the diagram. We show that the relevant topological behavior in cubic Kondo insulators can only reside at the lower symmetry X or M points in the Brillouin zone, leading to three Dirac cones with heavy quasiparticles.
authors: Department of Physics and Astronomy, Center for Materials Theory, Rutgers University, Piscataway, New Jersey 08854-8019, USA.
authors: Victor
authors: V
authors: Alexandrov
authors: Department of Physics, Kent State University, Kent, Ohio 44242, USA.
authors: Maxim
authors: M
authors: Dzero
authors: Department of Physics and Astronomy, Center for Materials Theory, Rutgers University, Piscataway, New Jersey 08854-8019, USA and Department of Physics, Royal Holloway, University of London, Egham, Surrey TW20 0EX, United Kingdom.
authors: Piers
authors: P
authors: Coleman