Many-body instabilities and mass generation in slow Dirac materials

POSTER

Abstract

Some Kondo insulators are expected to possess topologically protected surface states with linear Dirac spectrum, the topological Kondo insulators. Because the bulk states of these systems typically have heavy effective electron masses, the surface states may exhibit extraordinarily small Fermi velocities that could force the effective fine structure constant of the surface states into the strong coupling regime. Using a tight-binding model we study the many-body instabilities of these systems and identify regions of parameter space for which antiferromagnetic, ferromagnetic and charge density wave instabilities occur.

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Authors

  • Christopher Triola

    Department of Physics, College of William and Mary, Williamsburg, Virginia 23187, USA, William \& Mary Coll

  • Jianxin Zhu

    Los Alamos Natl Lab, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA, Los Alamos National Laboratory, Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA, Center for Integrated Nano Technology, Los Alamos National Laboratory

  • Albert Migliori

    Los Alamos National Laboratory, Seaborg Institute, Los Alamos National Laboratory

  • Alexander Balatsky

    Institute for Materials Science, Los Alamos National Laboratory, Los Alamos National Laboratory/Nordita