Numerical study of the periodic Anderson model with a quarter-filled conduction band

ORAL

Abstract

Using the dynamical cluster approximation with continuous-time quantum Monte Carlo as the cluster solver and the recently introduced dual-fermion method, we study the underlying physics of the periodic Anderson model where the conduction band is near quarter-filling while the f-band electron band is half filled. For these parameters, the RKKY coupling changes its nature from ferromagnetic to anti-ferromagnetic, yielding an interesting phase-diagram. Especially, we find the charge ordering of the conduction band is strongly enhanced, which could be due to the proximity to a quantum critical point.

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Authors

  • Shuxiang Yang

    Department of Physics \& Astronomy and Center for Computation \& Technology, Louisiana State University, Baton Rouge, LA 70803, USA, Louisiana State Univ - Baton Rouge, Louisiana State University

  • Juana Moreno

    Department of Physics \& Astronomy and Center for Computation \& Technology, Louisiana State University, Baton Rouge, LA 70803, USA, Louisiana State Univ - Baton Rouge

  • Mark Jarrell

    Louisiana State University, Louisiana State Univ - Baton Rouge, Department of Physics \& Astronomy and Center for Computation \& Technology, Louisiana State University, Baton Rouge, LA 70803, USA, Department of Physics and Astronomy, Louisiana State University, Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA