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