Metal-Insulator transitions in the periodic Anderson model

TL;DR

This paper investigates the metal-insulator transition in the periodic Anderson model within the Mott-Hubbard regime using dynamical mean field theory, revealing doping-dependent transition characteristics that differ from the single band Hubbard model.

Contribution

It demonstrates that the metal-insulator transition in the periodic Anderson model varies with doping type, challenging the universality of the single band Hubbard model's transition scenario.

Findings

Doping-induced MIT shows first order transition with divergent effective mass.

Hole doping leads to a non-first order transition without divergent mass.

Transition behavior differs significantly from the single band Hubbard model.

Abstract

We solve the Periodic Anderson model in the Mott-Hubbard regime, using Dynamical Mean Field Theory. Upon electron doping of the Mott insulator, a metal-insulator transition occurs which is qualitatively similar to that of the single band Hubbard model, namely with a divergent effective mass and a first order character at finite temperatures. Surprisingly, upon hole doping, the metal-insulator transition is not first order and does not show a divergent mass. Thus, the transition scenario of the single band Hubbard model is not generic for the Periodic Anderson model, even in the Mott-Hubbard regime.