Kondo Breakdown in Topological Kondo Insulators

Victor Alexandrov, Piers Coleman, and Onur Erten
Phys. Rev. Lett. 114, 177202 – Published 28 April 2015
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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.

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  • Received 13 January 2015

DOI:https://doi.org/10.1103/PhysRevLett.114.177202

© 2015 American Physical Society

Authors & Affiliations

Victor Alexandrov1, Piers Coleman1,2, and Onur Erten1

  • 1Center for Materials Theory, Rutgers University, Piscataway, New Jersey 08854, USA
  • 2Department of Physics, Royal Holloway, University of London, Egham, Surrey TW20 0EX, United Kingdom

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Issue

Vol. 114, Iss. 17 — 1 May 2015

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