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Article: Spin and orbital valence bond solids in a one-dimensional spin-orbital system: Schwinger boson mean-field theory

TitleSpin and orbital valence bond solids in a one-dimensional spin-orbital system: Schwinger boson mean-field theory
Authors
Issue Date2005
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B - Condensed Matter And Materials Physics, 2005, v. 72 n. 21 How to Cite?
AbstractA generalized one-dimensional SU (2) ×SU (2) spin-orbital model is studied by means of Schwinger boson mean-field theory (SBMFT). We focus on exploring the dimer phases and clarify how to capture properly the low-temperature properties of the system. The phase diagrams for the cases of S=T=1/2 and of S=1 and T=1/2 are presented. Three dimer phases, the orbital valence bond state, spin valence bond state and spin-orbital valence bond state, are found to arise in proper parameter regions. The results indicate that the SU (2) ×SU (2) type of spin-orbit coupling can serve as both the spin-Peierls and orbital-Peierls mechanisms which are responsible for the formations of spin singlet and orbital singlet, respectively. We have also calculated the static spin and pseudospin susceptibilities in the SBMFT scheme to characterize and distinguish the three types of dimer phases. © 2005 The American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/80992
ISSN
2014 Impact Factor: 3.736
2015 SCImago Journal Rankings: 1.933
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLi, Pen_HK
dc.contributor.authorShen, SQen_HK
dc.date.accessioned2010-09-06T08:12:33Z-
dc.date.available2010-09-06T08:12:33Z-
dc.date.issued2005en_HK
dc.identifier.citationPhysical Review B - Condensed Matter And Materials Physics, 2005, v. 72 n. 21en_HK
dc.identifier.issn1098-0121en_HK
dc.identifier.urihttp://hdl.handle.net/10722/80992-
dc.description.abstractA generalized one-dimensional SU (2) ×SU (2) spin-orbital model is studied by means of Schwinger boson mean-field theory (SBMFT). We focus on exploring the dimer phases and clarify how to capture properly the low-temperature properties of the system. The phase diagrams for the cases of S=T=1/2 and of S=1 and T=1/2 are presented. Three dimer phases, the orbital valence bond state, spin valence bond state and spin-orbital valence bond state, are found to arise in proper parameter regions. The results indicate that the SU (2) ×SU (2) type of spin-orbit coupling can serve as both the spin-Peierls and orbital-Peierls mechanisms which are responsible for the formations of spin singlet and orbital singlet, respectively. We have also calculated the static spin and pseudospin susceptibilities in the SBMFT scheme to characterize and distinguish the three types of dimer phases. © 2005 The American Physical Society.en_HK
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.rightsPhysical Review B (Condensed Matter and Materials Physics). Copyright © American Physical Society.en_HK
dc.titleSpin and orbital valence bond solids in a one-dimensional spin-orbital system: Schwinger boson mean-field theoryen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=72&spage=214439:1&epage=6&date=2005&atitle=Spin+and+orbital+valence+bond+solids+in+a+one-dimensional+spin-orbital+system: Schwinger+boson+mean-field+theoryen_HK
dc.identifier.emailShen, SQ: sshen@hkucc.hku.hken_HK
dc.identifier.authorityShen, SQ=rp00775en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1103/PhysRevB.72.214439en_HK
dc.identifier.scopuseid_2-s2.0-33644517581en_HK
dc.identifier.hkuros114202en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33644517581&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume72en_HK
dc.identifier.issue21en_HK
dc.identifier.isiWOS:000234335400108-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLi, P=26643192100en_HK
dc.identifier.scopusauthoridShen, SQ=7403431266en_HK

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