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Previous issue date: 2015-07-07 / Neste trabalho nos investigamos o efeito de um emparelhamento do tipo BCS para f?rmions livres sem spin, em 1 + 1 dimens?es. Usando t?cnicas de bosoniza??o testamos a exist?ncia de modos de quasipart?culas no estado supercondutor resultante. N?s calculamos a fun??o de Green de uma part?cula isolada, a fun??o de correla??o de pares e a condutividade ?ptica e mostramos como elas diferem das fun??es an?logas para quasipart?culas convencionais. N?s compararmos os nossos resultados com os resultados experimentais relacionados aos supercondutores de alta temperatura e mostramos que eles se encaixam qualitativamente bem com os modos de quasipart?culas observados nesses materiais. / In this work we investigate the e ect of a BCS-type pairing for free spinless fermions,
in 1+1 dimension. Using bosonization techniques we test the existence of quasiparticle
modes in the resulting BCS like superconducting state. We calculate the single
particle Green's function, the pair correlation function, the spectral function and the
optical conductivity and we show how they di er from their conventional quasiparticle
analogues. We compare our results with the related experimental ndings for high
temperature superconductors and we show that they t qualitatively well the observed
quasiparticles modes in those materials.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/20579 |
| Date | 07 July 2015 |
| Creators | Eneias, Ronivon Louren?o |
| Contributors | 08158428487, Melnikov, Dmitry, 70183984102, Correa, Eberth de Ameida, 79818005104, Marino, Eduardo Cantera, 22209530091, Sodano, Pasquale, 70080368417, Ferraz Filho, ?lvaro |
| Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM F?SICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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