Periodic Anderson model with correlated conduction electrons

Anderson impurity in a correlated conduction band

We investigate the physics of a magnetic impurity with spin 1/2 in a correlated metallic host. Describing the band by a Hubbard Hamiltonian, the problem is analyzed using dynamical mean-field theory in combination with Wilson's nonperturbative numerical renormalization group. We present results for the single-particle density of states and the dynamical spin susceptibility at zero temperature. ...

Protracted screening in the periodic Anderson model

The asymmetric infinite-dimensional periodic Anderson model is examined with a quantum Monte Carlo simulation. For small conduction band filling, we find a severe reduction in the Kondo scale, compared to the impurity value, as well as protracted spin screening consistent with some recent controversial photoemission experiments. The Kondo screening drives a ferromagnetic transition when the con...

Ferromagnetism in the Periodic Anderson Model

We compare different approximation schemes for investigating ferromagnetism in the periodic Anderson model. The use of several approximations allows for a detailed analysis of the implications of the respective methods, and also of the mechanisms driving the ferromagnetic transition. For the Kondo limit, our results confirm a previously proposed mechanism leading to ferromagnetic order, namely ...

Strongly correlated electrons

Enhancement of thermal transport in the degenerate periodic Anderson model

V. Zlatić,1,2 R. Monnier,3 and J. K. Freericks4 1Institute of Physics, Bijenička c. 46, 10001 Zagreb, Croatia 2International School for Advanced Studies (SISSA), Via Beirut 2-4, I-34014 Trieste, Italy 3ETH Hönggerberg, Laboratorium für Festkörperphysik, 8093 Zürich, Switzerland 4Department of Physics, Georgetown University, Washington, D.C. 20057, USA Received 7 April 2008; revised manuscript r...