Tay, Tiamhock and Motrunich, Olexei I. (2010) Possible Exciton Bose Liquid in a Hard-Core Boson Ring Model. Physical Review Letters, 105 (18). Art. No. 187202. ISSN 0031-9007 http://resolver.caltech.edu/CaltechAUTHORS:20101110-105823754
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We present a quantum Monte Carlo study of a hard-core boson model with ring-only exchanges on a square lattice, where a K_1 term acts on 1×1 plaquettes and a K_2 term acts on 1×2 and 2×1 plaquettes. At half-filling, the phase diagram reveals charge density wave for small K_2, valence bond solid for intermediate K_2, and possibly for large K_2 the novel exciton Bose liquid (EBL) phase first proposed by Paramekanti et al [Phys. Rev. B 66, 054526 (2002)]. Away from half-filling, the EBL phase is present already for intermediate K_2 and remains stable for a range of densities below 1/2 before phase separation sets in at lower densities.
|Additional Information:||© 2010 The American Physical Society. Received 28 July 2010; published 25 October 2010. We are thankful to M. P. A. Fisher for inspiring discussions and encouragement throughout this work. The research is supported by the NSF through Grant No. DMR-0907145 and the A. P. Sloan Foundation. We also acknowledge using the IT2 cluster at the Caltech CACR.|
|Classification Code:||PACS: 75.10.Jm, 05.30.Jp, 71.10.Pm, 75.10.Kt|
|Official Citation:||Tay, T. and O. I. Motrunich (2010). "Possible Exciton Bose Liquid in a Hard-Core Boson Ring Model." Physical Review Letters 105(18): 187202.|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||16 Nov 2010 19:42|
|Last Modified:||26 Dec 2012 12:37|
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