A local moment approach to the Anderson model

A theory is developed for the single-particle spectra of the symmetric Anderson model, in which local moments are introduced explicitly from the outset. Dynamical coupling of single-particle processes to low-energy spin-flip excitations leads, within the framework of a two-self-energy description, t...

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Päätekijät: Logan, D, Eastwood, M, Tusch, M
Aineistotyyppi: Journal article
Julkaistu: 1998
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author Logan, D
Eastwood, M
Tusch, M
author_facet Logan, D
Eastwood, M
Tusch, M
author_sort Logan, D
collection OXFORD
description A theory is developed for the single-particle spectra of the symmetric Anderson model, in which local moments are introduced explicitly from the outset. Dynamical coupling of single-particle processes to low-energy spin-flip excitations leads, within the framework of a two-self-energy description, to a theory in which both low- and high-energy spectral features are simultaneously captured, while correctly preserving Fermi liquid behaviour at low energies. The atomic limit, non-interacting limit and strong-coupling behaviour of the spectrum are each recovered. For strong coupling in particular, both the exponential asymptotics of the Kondo resonance and concomitant many-body broadening of the Hubbard satellite bands are shown to arise naturally within the present approach.
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spelling oxford-uuid:e9c12a3c-b95c-4c19-ae4d-ce1fc033ac9e2022-03-27T10:56:28ZA local moment approach to the Anderson modelJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:e9c12a3c-b95c-4c19-ae4d-ce1fc033ac9eSymplectic Elements at Oxford1998Logan, DEastwood, MTusch, MA theory is developed for the single-particle spectra of the symmetric Anderson model, in which local moments are introduced explicitly from the outset. Dynamical coupling of single-particle processes to low-energy spin-flip excitations leads, within the framework of a two-self-energy description, to a theory in which both low- and high-energy spectral features are simultaneously captured, while correctly preserving Fermi liquid behaviour at low energies. The atomic limit, non-interacting limit and strong-coupling behaviour of the spectrum are each recovered. For strong coupling in particular, both the exponential asymptotics of the Kondo resonance and concomitant many-body broadening of the Hubbard satellite bands are shown to arise naturally within the present approach.
spellingShingle Logan, D
Eastwood, M
Tusch, M
A local moment approach to the Anderson model
title A local moment approach to the Anderson model
title_full A local moment approach to the Anderson model
title_fullStr A local moment approach to the Anderson model
title_full_unstemmed A local moment approach to the Anderson model
title_short A local moment approach to the Anderson model
title_sort local moment approach to the anderson model
work_keys_str_mv AT logand alocalmomentapproachtotheandersonmodel
AT eastwoodm alocalmomentapproachtotheandersonmodel
AT tuschm alocalmomentapproachtotheandersonmodel
AT logand localmomentapproachtotheandersonmodel
AT eastwoodm localmomentapproachtotheandersonmodel
AT tuschm localmomentapproachtotheandersonmodel