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dc.contributor.authorNakata, Koukien
dc.contributor.authorTotsuka, Keisukeen
dc.contributor.alternative仲田, 光樹ja
dc.description.abstractWe extend the quantum dimer model (QDM) introduced by Rokhsar and Kivelson so as to construct a concrete example of the model which exhibits the first-order phase transition between different valence-bond solids suggested recently by Batista and Trugman and look for the possibility of other exotic dimer states. We show that our model contains three exotic valence-bond phases (herringbone, checkerboard and dimer smectic) in the ground-state phase diagram and that it realizes the phase transition from the staggered valence-bond solid to the herringbone. The checkerboard phase has four-fold rotational symmetry, while the dimer smectic, in the absence of quantum fluctuations, has massive degeneracy originating from partial ordering only in one of the two spatial directions. A resonance process involving three dimers resolves this massive degeneracy and the dimer smectic becomes ordered (order from disorder).en
dc.publisherIOP Publishing Ltd and SISSAen
dc.rights© IOP Publishing 2011en
dc.rightsThis is not the published version. Please cite only the published version.en
dc.subjectdimers (theory)en
dc.subjectphase diagrams (theory)en
dc.subjectquantum phase transitions (theory)en
dc.titleExtended quantum dimer model and novel valence-bond phasesen
dc.typejournal article-
dc.type.niitypeJournal Article-
dc.identifier.jtitleJournal of Statistical Mechanics: Theory and Experimenten
dcterms.accessRightsopen access-
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