Kondo resonance for orbitally degenerate systems
Strongly Correlated Electrons
2009-11-10 v1
Abstract
Formation of the Kondo state in general two-band Anderson model has been investigated within the numerical renormalization group (NRG) calculations. The Abrikosov-Suhl resonance is essentially asymmetric for the model with one electron per impurity (quarter filling case) in contrast with the one-band case. An external magnetic (pseudo-magnetic) field breaking spin (orbital) degeneracy leads to asymmetric splitting and essential broadening of the many-body resonance. Unlike the standard Anderson model, the ``spin up'' Kondo peak is pinned against the Fermi level, but not suppressed by magnetic field.
Cite
@article{arxiv.cond-mat/0411323,
title = {Kondo resonance for orbitally degenerate systems},
author = {A. K. Zhuravlev and V. Yu. Irkhin and M. I. Katsnelson and A. I. Lichtenstein},
journal= {arXiv preprint arXiv:cond-mat/0411323},
year = {2009}
}
Comments
It will be published in Physical Review Letters