Two-Impurity Dynamical-Mean-Field-Theory Study of the Periodic Anderson Model

ORAL

Abstract

We solve the periodic Anderson model using a two impurity dynamical mean field theory via QMC. We obtain the temperature v.s. hybridization phase diagram. In the crossover region, we observe logarithmic temperature ($T$) dependence in energy. As the quantum critical point (QCP) is approached, both the Neel and the lattice Kondo temperatures decrease and the two lines do not tend to cross at a finite temperature. We observe strong ferromagnetic spin fluctuations near the QCP on the Kondo side. Our results indicate that the critical spin susceptibility is local in space at the QCP.

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Authors

  • Ping Sun

    • Rutgers University

  • Gabriel Kotliar

    • Rutgers University
    • Center for Materials Theory, Department of Physics and Astronomy, Rutgers University
    • Department of Physics, Rutgers University, Piscataway NJ USA
    • Department of Physics and Astronomy, Rutgers University, 136 Frelinghuysen Road, Piscataway, NJ 08854-8019, USA
    • Center for Materials Theory, Serin Physics Laboratory, Rutgers University, 136 Frelinghuysen Road, Piscataway, New Jersey 08854
    • Physics Department and Center for Materials, Rutgers University, Piscataway NJ USA