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dc.contributor.author
Roura Bas, Pablo Gines
dc.contributor.author
Hamad, Ignacio Javier
dc.contributor.author
Anda, E.V.
dc.date.available
2018-02-28T19:43:04Z
dc.date.issued
2015-02
dc.identifier.citation
Roura Bas, Pablo Gines; Hamad, Ignacio Javier; Anda, E.V.; Ground state of the impurity Anderson model revisited: A projector operator solution; Wiley VCH Verlag; Physica Status Solidi B-basic Research; 252; 2; 2-2015; 421-430
dc.identifier.issn
0370-1972
dc.identifier.uri
http://hdl.handle.net/11336/37482
dc.description.abstract
By means of a projector operator formalism we study the ground state properties of the Anderson Impurity Hamiltonian. The non-perturbative treatment of the model agrees with the previous one, obtained by Inagaki [Prog. Theor. Phys. 62, 1441 (1979)] by means of a perturbation expansion with respect the hybridization term. We go beyond the Inagaki's formalism to the next leading order. It provides a very accurate calculation of the energy spectrum in the total spin ST=0 sector and, in particular, the ground state energy in the whole parameter space. For a one body spinless system, the dependence of the ground state energy as a function of the impurity level obtained by this procedure remarkably agrees with analytical results. For the many body case the occupancy of the impurity as a function of the parameters is studied and it agrees with the corresponding one obtained by using the Bethe ansatz and the Numerical Renormalization Group solution of the Hamiltonian. The magnetization and susceptibility of the impurity is analyzed by studying the response of the system to an external magnetic field, from which it is possible to extract the Kondo temperature. The dependence of the Kondo scale with the parameters of the model is in excellent agreement with well-known results.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley VCH Verlag
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Anderson Hamiltonian
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Anderson Impurity Model
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Ground State
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Kondo Effect
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Projector Operator Formalism
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Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Ground state of the impurity Anderson model revisited: A projector operator solution
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-02-28T14:14:48Z
dc.journal.volume
252
dc.journal.number
2
dc.journal.pagination
421-430
dc.journal.pais
Alemania
dc.journal.ciudad
Weinheim
dc.description.fil
Fil: Roura Bas, Pablo Gines. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Hamad, Ignacio Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina
dc.description.fil
Fil: Anda, E.V.. Pontifícia Universidade Católica do Rio de Janeiro PUC-Rio. Centro de Estudos em Telecomunicaciones. Laboratorio de Semiconductores; Brasil
dc.journal.title
Physica Status Solidi B-basic Research
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/pssb.201451520/abstract
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/pssb.201451520
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