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Quantum Phase Diagram of an Exactly Solved Mixed Spin Ladder

Batchelor, Murray; Guan, Xi-Wen; Oelkers, Norman; Ying, Zu-Jian

Description

We investigate the quantum phase diagram of the exactly solved mixed spin-(1/2,1) ladder via the thermodynamic Bethe ansatz (TBA). In the absence of a magnetic field the model exhibits three quantum phases associated with su(2), su(4), and su(6) symmetries. In the presence of a strong magnetic field, there is a third and full saturation magnetization plateaux within the strong antiferromagnetic rung coupling regime. Gapless and gapped phases appear in turn as the magnetic field increases. For...[Show more]

dc.contributor.authorBatchelor, Murray
dc.contributor.authorGuan, Xi-Wen
dc.contributor.authorOelkers, Norman
dc.contributor.authorYing, Zu-Jian
dc.date.accessioned2015-12-13T22:38:18Z
dc.date.available2015-12-13T22:38:18Z
dc.identifier.issn0022-4715
dc.identifier.urihttp://hdl.handle.net/1885/77493
dc.description.abstractWe investigate the quantum phase diagram of the exactly solved mixed spin-(1/2,1) ladder via the thermodynamic Bethe ansatz (TBA). In the absence of a magnetic field the model exhibits three quantum phases associated with su(2), su(4), and su(6) symmetries. In the presence of a strong magnetic field, there is a third and full saturation magnetization plateaux within the strong antiferromagnetic rung coupling regime. Gapless and gapped phases appear in turn as the magnetic field increases. For weak rung coupling, the fractional magnetization plateau vanishs and the model undergoes new quantum phase transitions. However, in the ferromagnetic coupling regime, the system does not have a third saturation magnetization plateau. The critical behaviour in the vicinity of the critical points is also derived systematically using the TBA.
dc.publisherKluwer Academic Publishers
dc.sourceJournal of Statistical Physics
dc.subjectKeywords: exactly solved model; magnetization; mixed spin ladder; phase diagram; plateaux
dc.titleQuantum Phase Diagram of an Exactly Solved Mixed Spin Ladder
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume116
dc.date.issued2004
local.identifier.absfor020404 - Electronic and Magnetic Properties of Condensed Matter; Superconductivity
local.identifier.ariespublicationMigratedxPub6344
local.type.statusPublished Version
local.contributor.affiliationBatchelor, Murray, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationGuan, Xi-Wen, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationOelkers, Norman, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationYing, Zu-Jian, Hangzhou Teachers College
local.bibliographicCitation.issue114
local.bibliographicCitation.startpage571
local.bibliographicCitation.lastpage589
local.identifier.doi10.1023/B:JOSS.0000037225.79748.98
dc.date.updated2015-12-11T09:42:45Z
local.identifier.scopusID2-s2.0-4344694213
CollectionsANU Research Publications

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