Quantum phases and phase transitions of frustrated hard-core bosons on a triangular ladder

Mishra, Tapan and Pai, Ramesh V and Mukerjee, Subroto and Paramekanti, Arun (2013) Quantum phases and phase transitions of frustrated hard-core bosons on a triangular ladder. In: Physical Review B, 87 (17). 174504_1-174504_9.

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Abstract

Kinetically frustrated bosons at half filling in the presence of a competing nearest-neighbor repulsion support a wide supersolid regime on the two-dimensional triangular lattice. We study this model on a two-leg ladder using the finite-size density-matrix renormalization-group method, obtaining a phase diagram which contains three phases: a uniform superfluid (SF), an insulating charge density wave (CDW) crystal, and a bond ordered insulator (BO). We show that the transitions from SF to CDW and SF to BO are continuous in nature, with critical exponents varying continuously along the phase boundaries, while the transition from CDW to BO is found to be first order. The phase diagram is also found to contain an exactly solvable Majumdar Ghosh point, and reentrant SF to CDW phase transitions.

Item Type:	Journal Article
Publication:	Physical Review B
Publisher:	American Physical Society
Additional Information:	Copyright of this article belongs to American Physical Society.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	27 Jun 2013 07:53
Last Modified:	27 Jun 2013 07:53
URI:	http://eprints.iisc.ac.in/id/eprint/46753

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