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Article: Pseudospin SU(2)-symmetry breaking, charge-density waves and superconductivity in the Hubbard model

TitlePseudospin SU(2)-symmetry breaking, charge-density waves and superconductivity in the Hubbard model
Authors
Issue Date1996
PublisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/Journals/jpcm
Citation
Journal Of Physics Condensed Matter, 1996, v. 8 n. 26, p. 4805-4812 How to Cite?
AbstractIn this paper, we discuss the physical consequences of pseudospin SU(2)-symmetry breaking in a negative-U Hubbard model at half-filling. If pseudospin symmetry is spontaneously broken while its unique subgroup U(1) remains invariant, this will lead to a charge-density-wave (CDW) ground state. Furthermore, if the U(1) symmetry is also broken, the ground state will have off-diagonal long-range order, signalling a superconductor. In this case, CDW and superconductivity coexist and form a supersolid. Finally, we show that CDW suppress, but do not destroy superconductivity.
Persistent Identifierhttp://hdl.handle.net/10722/174725
ISSN
2015 Impact Factor: 2.209
2015 SCImago Journal Rankings: 0.812
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorShen, SQen_US
dc.contributor.authorXie, XCen_US
dc.date.accessioned2012-11-26T08:47:05Z-
dc.date.available2012-11-26T08:47:05Z-
dc.date.issued1996en_US
dc.identifier.citationJournal Of Physics Condensed Matter, 1996, v. 8 n. 26, p. 4805-4812en_US
dc.identifier.issn0953-8984en_US
dc.identifier.urihttp://hdl.handle.net/10722/174725-
dc.description.abstractIn this paper, we discuss the physical consequences of pseudospin SU(2)-symmetry breaking in a negative-U Hubbard model at half-filling. If pseudospin symmetry is spontaneously broken while its unique subgroup U(1) remains invariant, this will lead to a charge-density-wave (CDW) ground state. Furthermore, if the U(1) symmetry is also broken, the ground state will have off-diagonal long-range order, signalling a superconductor. In this case, CDW and superconductivity coexist and form a supersolid. Finally, we show that CDW suppress, but do not destroy superconductivity.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/Journals/jpcmen_US
dc.relation.ispartofJournal of Physics Condensed Matteren_US
dc.titlePseudospin SU(2)-symmetry breaking, charge-density waves and superconductivity in the Hubbard modelen_US
dc.typeArticleen_US
dc.identifier.emailShen, SQ: sshen@hkucc.hku.hken_US
dc.identifier.authorityShen, SQ=rp00775en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1088/0953-8984/8/26/012en_US
dc.identifier.scopuseid_2-s2.0-0030170269en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0030170269&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume8en_US
dc.identifier.issue26en_US
dc.identifier.spage4805en_US
dc.identifier.epage4812en_US
dc.identifier.isiWOS:A1996UU80500012-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridShen, SQ=7403431266en_US
dc.identifier.scopusauthoridXie, XC=13502915800en_US

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