Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/27061
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Campo DC | Valor | Idioma |
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dc.contributor.author | Carmelo, José Manuel Pereira | - |
dc.contributor.author | Gu, Shi-Jian | - |
dc.contributor.author | Sacramento, Pedro D. | - |
dc.date.accessioned | 2013-12-16T23:08:07Z | - |
dc.date.available | 2013-12-16T23:08:07Z | - |
dc.date.issued | 2013-10-07 | - |
dc.date.submitted | 2012-07-04 | - |
dc.identifier.issn | 0003-4916 | por |
dc.identifier.uri | https://hdl.handle.net/1822/27061 | - |
dc.description.abstract | Even though the one-dimensional (1D) Hubbard model is solvable by the Bethe ansatz, at half-filling its finite-temperature T > 0 transport properties remain poorly understood. In this paper we combine that solution with symmetry to show that within that prominent T = 0 1D insulator the charge stiffness D(T ) vanishes for T > 0 and finite values of the on-site repulsion U in the thermodynamic limit. This result is exact and clarifies a long-standing open problem. It rules out that at half-filling the model is an ideal conductor in the thermodynamic limit. Whether at finite T and U > 0 it is an ideal insulator or a normal resistor remains an open question. That at half-filling the charge stiffness is finite at U = 0 and vanishes for U > 0 is found to result from a general transition from a conductor to an insulator or resistor occurring at U = Uc = 0 for all finite temperatures T > 0. (At T = 0 such a transition is the quantum metal to Mott–Hubbard-insulator transition.) The interplay of the η-spin SU(2) symmetry with the hidden U(1) symmetry beyond SO(4) is found to play a central role in the unusual finitetemperature charge transport properties of the 1D half-filled Hubbard model. | por |
dc.description.sponsorship | Even though the one-dimensional (1D) Hubbard model is solvable by the Bethe ansatz, at half-filling its finite-temperature T > 0 transport properties remain poorly understood. In this paper we combine that solution with symmetry to show that within that prominent T = 0 1D insulator the charge stiffness D ( T ) vanishes for T > 0 and finite values of the on-site repulsion U in the thermo- dynamic limit. This result is exact and clarifies a long-standing open problem. It rules out that at half-filling the model is an ideal con- ductor in the thermodynamic limit. Whether at finite T and U > 0 it is an ideal insulator or a normal resistor remains an open ques- tion. That at half-filling the charge stiffness is finite at U = 0 and vanishes for U > 0 is found to result from a general transition from a conductor to an insulator or resistor occurring at U = U c = 0 for all finite temperatures T > 0 | por |
dc.language.iso | eng | por |
dc.publisher | Elsevier | por |
dc.rights | restrictedAccess | por |
dc.subject | 1D Hubbard model at finite temperature | por |
dc.subject | 1D Hubbard model global symmetry | por |
dc.subject | 1D Hubbard model rotated-electron | por |
dc.subject | operator description | por |
dc.subject | Exotic transport of charge | por |
dc.subject | 1D Hubbard model rotated-electron operator description | por |
dc.title | Zero finite-temperature charge stiffness within the half-filled 1D Hubbard model | por |
dc.type | article | por |
dc.peerreviewed | yes | por |
dc.relation.publisherversion | http://www.elsevier.com/locate/aop | por |
sdum.publicationstatus | published | por |
oaire.citationStartPage | 484 | por |
oaire.citationEndPage | 509 | por |
oaire.citationTitle | Annals of Physics | por |
oaire.citationVolume | 339 | por |
dc.identifier.doi | 10.1016/j.aop.2013.09.020 | - |
dc.subject.wos | Science & Technology | por |
sdum.journal | Annals of Physics | por |
Aparece nas coleções: | CDF - CEP - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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13-DT.pdf Acesso restrito! | Ficheiro artigo | 1,4 MB | Adobe PDF | Ver/Abrir |