title: Kondo breakdown in topological Kondo insulators.
abstract: Motivated by the observation of light surface states in SmB6, we examine the effects of surface Kondo breakdown in topological Kondo insulators. We present both numerical and analytic results which show that the decoupling of the localized moments at the surface disturbs the compensation between light and heavy electrons and dopes the Dirac cone. Dispersion of these uncompensated surface states is dominated by intersite hopping, which leads to much lighter quasiparticles. These surface states are also highly durable against the effects of surface magnetism and decreasing thickness of the sample.
authors.affiliation: Center for Materials Theory, Rutgers University, Piscataway, New Jersey 08854, USA.
authors.forename: Victor
authors.initials: V
authors.lastname: Alexandrov
authors.affiliation: Center for Materials Theory, Rutgers University, Piscataway, New Jersey 08854, USA.|Department of Physics, Royal Holloway, University of London, Egham, Surrey TW20 0EX, United Kingdom.
authors.forename: Piers
authors.initials: P
authors.lastname: Coleman
authors.affiliation: Center for Materials Theory, Rutgers University, Piscataway, New Jersey 08854, USA.
authors.forename: Onur
authors.initials: O
authors.lastname: Erten