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Abstract:

We study the properties of strongly correlated systems, calculating the self-energy of the electronic propagator of small-size clusters. We focus our attention on the one-dimensional Hubbard model. It is shown that for adequate sizes and boundary conditions, the self-energy of such a small cluster possesses the correct singular behaviour in the vicinity of the Fermi level for all values of the intra-atomic electron-electron interaction parameter U. The charge-transfer gap and other physical properties of the system are obtained at the thermodynamic limit. The survival of a single-pole singularity at w = 0 for the infinite-system self-energy constitutes a criterion for establishing whether the system is an insulator or a metal. © 1999 IOP Publishing Ltd.

Registro:

Documento: Artículo
Título:The thermodynamical limit of strongly correlated systems obtained from small-size-cluster calculations
Autor:Chiappe, G.; Busser, C.; Anda, E.V.; Ferrari, V.
Filiación:Departamento de Física, Pontificia Universidade Catolica do Rio de Janeiro, Caixa Postal 38071, 22452-970, Rio de Janeiro, Brazil
Departamento de Física, Universidad de Buenos Aires, Pabellón I, 1428 Capital Federal, Buenos Aires, Argentina
Año:1999
Volumen:11
Número:27
Página de inicio:5237
Página de fin:5244
DOI: http://dx.doi.org/10.1088/0953-8984/11/27/301
Título revista:Journal of Physics Condensed Matter
Título revista abreviado:J Phys Condens Matter
ISSN:09538984
CODEN:JCOME
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09538984_v11_n27_p5237_Chiappe

Referencias:

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Citas:

---------- APA ----------
Chiappe, G., Busser, C., Anda, E.V. & Ferrari, V. (1999) . The thermodynamical limit of strongly correlated systems obtained from small-size-cluster calculations. Journal of Physics Condensed Matter, 11(27), 5237-5244.
http://dx.doi.org/10.1088/0953-8984/11/27/301
---------- CHICAGO ----------
Chiappe, G., Busser, C., Anda, E.V., Ferrari, V. "The thermodynamical limit of strongly correlated systems obtained from small-size-cluster calculations" . Journal of Physics Condensed Matter 11, no. 27 (1999) : 5237-5244.
http://dx.doi.org/10.1088/0953-8984/11/27/301
---------- MLA ----------
Chiappe, G., Busser, C., Anda, E.V., Ferrari, V. "The thermodynamical limit of strongly correlated systems obtained from small-size-cluster calculations" . Journal of Physics Condensed Matter, vol. 11, no. 27, 1999, pp. 5237-5244.
http://dx.doi.org/10.1088/0953-8984/11/27/301
---------- VANCOUVER ----------
Chiappe, G., Busser, C., Anda, E.V., Ferrari, V. The thermodynamical limit of strongly correlated systems obtained from small-size-cluster calculations. J Phys Condens Matter. 1999;11(27):5237-5244.
http://dx.doi.org/10.1088/0953-8984/11/27/301