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Article: A renormalised Hamiltonian approach to a resonant valence bond wavefunction

TitleA renormalised Hamiltonian approach to a resonant valence bond wavefunction
Authors
Issue Date1988
PublisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/journals/sust
Citation
Superconductor Science And Technology, 1988, v. 1 n. 1, p. 36-46 How to Cite?
AbstractThe effective Hamiltonian of strongly correlated electrons on a square lattice is replaced by a renormalised Hamiltonian and the factors that renormalise the kinetic energy of holes and the Heisenberg spin-spin coupling are calculated using a Gutzwiller approximation scheme. The accuracy of this renormalisation procedure is tested numerically and found to be qualitatively excellent. Within the scheme a resonant valence bond (RVB) wavefunction is found at half-filling to be lower in energy than the antiferromagnetic state. If the wavefunction is expressed in fermion operators, local SU(2) and U(1) invariance leads to a redundancy in the representation. The introduction of holes removes these local invariances and the authors find that a d-wave RVB state is lowest in energy. This state has a superconducting order parameter whose amplitude is linear in the density of holes.
Persistent Identifierhttp://hdl.handle.net/10722/174664
ISSN
2015 Impact Factor: 2.717
2015 SCImago Journal Rankings: 0.824
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhang, FCen_US
dc.contributor.authorGros, Cen_US
dc.contributor.authorRice, TMen_US
dc.contributor.authorShiba, Hen_US
dc.date.accessioned2012-11-26T08:46:47Z-
dc.date.available2012-11-26T08:46:47Z-
dc.date.issued1988en_US
dc.identifier.citationSuperconductor Science And Technology, 1988, v. 1 n. 1, p. 36-46en_US
dc.identifier.issn0953-2048en_US
dc.identifier.urihttp://hdl.handle.net/10722/174664-
dc.description.abstractThe effective Hamiltonian of strongly correlated electrons on a square lattice is replaced by a renormalised Hamiltonian and the factors that renormalise the kinetic energy of holes and the Heisenberg spin-spin coupling are calculated using a Gutzwiller approximation scheme. The accuracy of this renormalisation procedure is tested numerically and found to be qualitatively excellent. Within the scheme a resonant valence bond (RVB) wavefunction is found at half-filling to be lower in energy than the antiferromagnetic state. If the wavefunction is expressed in fermion operators, local SU(2) and U(1) invariance leads to a redundancy in the representation. The introduction of holes removes these local invariances and the authors find that a d-wave RVB state is lowest in energy. This state has a superconducting order parameter whose amplitude is linear in the density of holes.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/journals/susten_US
dc.relation.ispartofSuperconductor Science and Technologyen_US
dc.titleA renormalised Hamiltonian approach to a resonant valence bond wavefunctionen_US
dc.typeArticleen_US
dc.identifier.emailZhang, FC: fuchun@hkucc.hku.hken_US
dc.identifier.authorityZhang, FC=rp00840en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1088/0953-2048/1/1/009en_US
dc.identifier.scopuseid_2-s2.0-0007690360en_US
dc.identifier.volume1en_US
dc.identifier.issue1en_US
dc.identifier.spage36en_US
dc.identifier.epage46en_US
dc.identifier.isiWOS:A1988R346600009-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridZhang, FC=14012468800en_US
dc.identifier.scopusauthoridGros, C=7102388579en_US
dc.identifier.scopusauthoridRice, TM=7201893707en_US
dc.identifier.scopusauthoridShiba, H=7005943832en_US
dc.identifier.citeulike5750703-

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