Collective Kondo effect in the Anderson-Hubbard lattice
Strongly Correlated Electrons
2016-08-31 v1
Abstract
The periodic Anderson model is extended by switching on a Hubbard U for the conduction electrons. We use the Gutzwiller variational method to study the nearly integral valent limit. The lattice Kondo energy contains the U-dependent chemical potential of the Hubbard subsystem in the exponent, and the correlation-induced band narrowing in the prefactor. Both effects tend to suppress the Kondo scale, which can be understood to result from the blocking of hybridization. At half-filling, we find a Brinkman-Rice-type transition from a Kondo insulator to a Mott insulator.
Keywords
Cite
@article{arxiv.cond-mat/9611165,
title = {Collective Kondo effect in the Anderson-Hubbard lattice},
author = {P. Fazekas and K. Itai},
journal= {arXiv preprint arXiv:cond-mat/9611165},
year = {2016}
}
Comments
8 pages (latex) To appear in Physica B