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Heavy fermion properties of the Kondo Lattice model
We study the S = 1/2 Kondo lattice model which is widely used to describe heavy fermion behavior. In conventional treatments of the model the Kondo interaction is decoupled in favour of a hybridization of conduction and localized f electrons. However, such an approximation breaks the local gauge sym...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3776234/ https://www.ncbi.nlm.nih.gov/pubmed/24045670 http://dx.doi.org/10.1038/srep02691 |
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author | Sykora, Steffen Becker, Klaus W. |
author_facet | Sykora, Steffen Becker, Klaus W. |
author_sort | Sykora, Steffen |
collection | PubMed |
description | We study the S = 1/2 Kondo lattice model which is widely used to describe heavy fermion behavior. In conventional treatments of the model the Kondo interaction is decoupled in favour of a hybridization of conduction and localized f electrons. However, such an approximation breaks the local gauge symmetry and implicates that the local f-occupation is no longer conserved. To avoid these problems, we use in this work an alternative approach to the model based on the Projective Renormalization Method (PRM). Thereby, within the conduction electron spectral function we identify the lattice Kondo resonance as an almost flat excitation near the Fermi surface which is composed of conduction electron creation operators combined with localized spin fluctuations. This leads to an alternative description of the Kondo resonance without having to resort to an artificial symmetry breaking. |
format | Online Article Text |
id | pubmed-3776234 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-37762342013-09-18 Heavy fermion properties of the Kondo Lattice model Sykora, Steffen Becker, Klaus W. Sci Rep Article We study the S = 1/2 Kondo lattice model which is widely used to describe heavy fermion behavior. In conventional treatments of the model the Kondo interaction is decoupled in favour of a hybridization of conduction and localized f electrons. However, such an approximation breaks the local gauge symmetry and implicates that the local f-occupation is no longer conserved. To avoid these problems, we use in this work an alternative approach to the model based on the Projective Renormalization Method (PRM). Thereby, within the conduction electron spectral function we identify the lattice Kondo resonance as an almost flat excitation near the Fermi surface which is composed of conduction electron creation operators combined with localized spin fluctuations. This leads to an alternative description of the Kondo resonance without having to resort to an artificial symmetry breaking. Nature Publishing Group 2013-09-18 /pmc/articles/PMC3776234/ /pubmed/24045670 http://dx.doi.org/10.1038/srep02691 Text en Copyright © 2013, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/ |
spellingShingle | Article Sykora, Steffen Becker, Klaus W. Heavy fermion properties of the Kondo Lattice model |
title | Heavy fermion properties of the Kondo Lattice model |
title_full | Heavy fermion properties of the Kondo Lattice model |
title_fullStr | Heavy fermion properties of the Kondo Lattice model |
title_full_unstemmed | Heavy fermion properties of the Kondo Lattice model |
title_short | Heavy fermion properties of the Kondo Lattice model |
title_sort | heavy fermion properties of the kondo lattice model |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3776234/ https://www.ncbi.nlm.nih.gov/pubmed/24045670 http://dx.doi.org/10.1038/srep02691 |
work_keys_str_mv | AT sykorasteffen heavyfermionpropertiesofthekondolatticemodel AT beckerklausw heavyfermionpropertiesofthekondolatticemodel |