Approximate Treatment of a Two-Dimensional Anisotropic Peierls-Hubbard Model
dc.contributor.author | Bernhard, Ben Hur | pt_BR |
dc.contributor.author | Iglesias, Jose Roberto | pt_BR |
dc.date.accessioned | 2014-09-23T02:12:20Z | pt_BR |
dc.date.issued | 1993 | pt_BR |
dc.identifier.issn | 0163-1829 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/103614 | pt_BR |
dc.description.abstract | A Green-function formalism is presented to study a Peierls-Hubbard Hamiltonian in two dimensions. The 1attice consists of parallel dimerized chains with alternating nearest-neighbor hoppings t and t 11 and another hopping t 1 between different chains. The method treats the interdimer hopping as a perturbation and yields exact results in the uncorre1ated case and for isolated dimers. The calculated spectral functions exhibit a number of narrow subbands with typical low-dimensional singularities. The dependence of the gap at the Fermi levei on the electron-electron interaction U agrees qualitatively with the exact result in the known one-dimensional nondimerized limit. The paramagnetic susceptibility shows a maximum structure at low temperatures that is enhanced by U and by dimerization anda Curie-Weiss behavior at high temperatures. | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Physical review. B, Condensed matter. New York. Vol. 47, no. 19 (May 1993), p. 12408-12414 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Física da matéria condensada | pt_BR |
dc.subject | Modelo de hubbard | pt_BR |
dc.subject | Metodos de funcoes de green | pt_BR |
dc.subject | Materia condensada | pt_BR |
dc.title | Approximate Treatment of a Two-Dimensional Anisotropic Peierls-Hubbard Model | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000056645 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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