2011年1月
Extended quantum dimer model and novel valence-bond phases
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
- ,
- 巻
- 2011
- 号
- 1
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1088/1742-5468/2011/01/P01033
- 出版者・発行元
- IOP PUBLISHING LTD
We 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).
- リンク情報
- ID情報
-
- DOI : 10.1088/1742-5468/2011/01/P01033
- ISSN : 1742-5468
- Web of Science ID : WOS:000286629000036