Charge density wave instability in the periodic Anderson model with electron-phonon interaction

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 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. We calculated the susceptibilities for various possible orderings for the model. We found that the charge density wave ordering is robust at low temperature and for weak hybridization. The second order critical point is screened out by the formation of CDW. It is probable that the two phases should be Kondo singlet phase and CDW phase.

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Authors

  • Enzhi Li

    Department of Physics and Astronomy, Louisiana State University

  • Peng Zhang

    Xi'an Jiaotong University

  • Ka-Ming Tam

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

  • Shuxiang Yang

    Department of Physics and Astronomy, Louisiana State University

  • Juana Moreno

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

  • Mark Jarrell

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