Pair superfluid and supersolid of correlated hard-core bosons on a triangular lattice

• Main Authors: Jiang, Hong-Chen (Author), Fu, Liang (Contributor), Xu, Cenke (Author)
• Other Authors: Massachusetts Institute of Technology. Department of Physics (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society, 2012-10-10T20:12:11Z.
• Subjects: Article
• Online Access: Get fulltext

We have systematically studied the hard-core Bose-Hubbard model with correlated hopping on a triangular lattice using the density-matrix renormalization group method. A rich ground-state phase diagram is determined. In this phase diagram there is a supersolid phase and a pair superfluid phase due to the interplay between the ordinary frustrated boson hopping and an unusual correlated hopping. In particular, we find that the quantum phase transition between the supersolid phase and the pair superfluid phase is continuous.
National Science Foundation (U.S.). Materials Research Science and Engineering Centers (Program) (Award DMR 1121053)
Kavli Institute for Theoretical Physics (Grant PHY05-51164)
New Brunswick Research and Productivity Council (973 Program) (2011CBA00300)
New Brunswick Research and Productivity Council (973 Program) (2011CBA00302)