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Article: Generalized valence bond state and solvable models for spin-1/2 systems with orbital degeneracy

TitleGeneralized valence bond state and solvable models for spin-1/2 systems with orbital degeneracy
Authors
KeywordsPhysics
Issue Date2001
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B - Condensed Matter And Materials Physics, 2001, v. 64 n. 13, p. 1324111-1324114 How to Cite?
AbstractA spin-1/2 system with double orbital degeneracy may possess SU(4) symmetry. According to the group theory a global SU(4) singlet state can be expressed as a linear combination of all possible configurations consisting of four-site SU(4) singlets. Following Andersion's idea for spin-1/2 system, we propose that the ground state for the antiferromagnetic SU(4) model is an SU(4)-resonating valence-bond (RVB) state. A short-range SU(4)-RVB state is a spin and orbital liquid, and its elementary excitations has an energy gap. We construct a series of solvable models that ground states are short-range SU(4)-RVB states. The results are generalized to the antiferromagnetic SU(N) models.
Persistent Identifierhttp://hdl.handle.net/10722/43334
ISSN
2001 Impact Factor: 3.07
References

 

DC FieldValueLanguage
dc.contributor.authorShen, SQen_HK
dc.date.accessioned2007-03-23T04:43:46Z-
dc.date.available2007-03-23T04:43:46Z-
dc.date.issued2001en_HK
dc.identifier.citationPhysical Review B - Condensed Matter And Materials Physics, 2001, v. 64 n. 13, p. 1324111-1324114en_HK
dc.identifier.issn0163-1829en_HK
dc.identifier.urihttp://hdl.handle.net/10722/43334-
dc.description.abstractA spin-1/2 system with double orbital degeneracy may possess SU(4) symmetry. According to the group theory a global SU(4) singlet state can be expressed as a linear combination of all possible configurations consisting of four-site SU(4) singlets. Following Andersion's idea for spin-1/2 system, we propose that the ground state for the antiferromagnetic SU(4) model is an SU(4)-resonating valence-bond (RVB) state. A short-range SU(4)-RVB state is a spin and orbital liquid, and its elementary excitations has an energy gap. We construct a series of solvable models that ground states are short-range SU(4)-RVB states. The results are generalized to the antiferromagnetic SU(N) models.en_HK
dc.format.extent60577 bytes-
dc.format.extent34304 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeapplication/msword-
dc.languageengen_HK
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/en_HK
dc.relation.ispartofPhysical Review B - Condensed Matter and Materials Physicsen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsPhysical Review B (Condensed Matter and Materials Physics). Copyright © American Physical Society.en_HK
dc.subjectPhysicsen_HK
dc.titleGeneralized valence bond state and solvable models for spin-1/2 systems with orbital degeneracyen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=64&issue=13&spage=132411:1&epage=4&date=2001&atitle=Generalized+valence+bond+state+and+solvable+models+for+spin-1/2+systems+with+orbital+degeneracyen_HK
dc.identifier.emailShen, SQ: sshen@hkucc.hku.hken_HK
dc.identifier.authorityShen, SQ=rp00775en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1103/PhysRevB.64.132411en_HK
dc.identifier.scopuseid_2-s2.0-0035494316en_HK
dc.identifier.hkuros64926-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035494316&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume64en_HK
dc.identifier.issue13en_HK
dc.identifier.spage1324111en_HK
dc.identifier.epage1324114en_HK
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridShen, SQ=7403431266en_HK

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