Low temperature phases of the periodic Anderson model with electron-phonon correlation

ORAL

Abstract

We study the periodic Anderson model with the conduction electrons coupled to phonons. It has been shown by using the dynamical mean field theory that the model contains two disordered phases, the Kondo singlet phase for strong hybridization and the local moment phase for weak hybridization. In the hybridization-temperature plane, these two phases are separated by a first order phase transition line which terminates at a second order phase transition point. At low temperature the entropy in the Kondo singlet phase is quenched by the formation of a Fermi liquid, while the local moment phase will have residual entropy unless it is quenched by ordering. We calculate the lattice charge susceptibility to demonstrate that the conduction electrons form a charge density wave ordering below a critical temperature.

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Authors

  • Enzhi Li

    Louisiana State University

  • Peng Zhang

    Carnegie Institution of Washington

  • 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

  • Ka-Ming Tam

    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, Lousiana State University, Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA

  • Juana Moreno

    Louisiana State University, Louisiana State Univ - Baton Rouge, Department of Physics and Astronomy, Louisiana State University, Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA

  • 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