Supersymmetric Approach to Heavy-Fermion Systems
Strongly Correlated Electrons
2015-06-25 v1
Abstract
We present a new supersymmetric approach to the Kondo lattice model in order to describe simultaneously the quasiparticle excitations and the low-energy magnetic fluctuations in heavy-Fermion systems. This approach mixes the fermionic and the bosonic representation of the spin following the standard rules of superalgebra. Our results show the formation of a bosonic band within the hybridization gap reflecting the spin collective modes. The density of states at the Fermi level is strongly renormalized while the Fermi surface sum rule includes states. The dynamical susceptibility is made of a Fermi liquid superimposed on a localized magnetism contribution.
Keywords
Cite
@article{arxiv.cond-mat/9811380,
title = {Supersymmetric Approach to Heavy-Fermion Systems},
author = {C. Pepin and M. Lavagna},
journal= {arXiv preprint arXiv:cond-mat/9811380},
year = {2015}
}
Comments
5 pages, 2 figures