The thermodynamical limit of strongly correlated systems obtained from small-size-cluster calculations
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 p...
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todo:paper_09538984_v11_n27_p5237_Chiappe2023-10-03T15:51:23Z The thermodynamical limit of strongly correlated systems obtained from small-size-cluster calculations Chiappe, G. Busser, C. Anda, E.V. Ferrari, V. 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. Fil:Ferrari, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09538984_v11_n27_p5237_Chiappe |
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Universidad de Buenos Aires |
| institution_str |
I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| description |
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. |
| format |
JOUR |
| author |
Chiappe, G. Busser, C. Anda, E.V. Ferrari, V. |
| spellingShingle |
Chiappe, G. Busser, C. Anda, E.V. Ferrari, V. The thermodynamical limit of strongly correlated systems obtained from small-size-cluster calculations |
| author_facet |
Chiappe, G. Busser, C. Anda, E.V. Ferrari, V. |
| author_sort |
Chiappe, G. |
| title |
The thermodynamical limit of strongly correlated systems obtained from small-size-cluster calculations |
| title_short |
The thermodynamical limit of strongly correlated systems obtained from small-size-cluster calculations |
| title_full |
The thermodynamical limit of strongly correlated systems obtained from small-size-cluster calculations |
| title_fullStr |
The thermodynamical limit of strongly correlated systems obtained from small-size-cluster calculations |
| title_full_unstemmed |
The thermodynamical limit of strongly correlated systems obtained from small-size-cluster calculations |
| title_sort |
thermodynamical limit of strongly correlated systems obtained from small-size-cluster calculations |
| url |
http://hdl.handle.net/20.500.12110/paper_09538984_v11_n27_p5237_Chiappe |
| work_keys_str_mv |
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