Supersolids versus Phase Separation in Two-Dimensional Lattice Bosons

Pinaki Sengupta, Leonid P. Pryadko, Fabien Alet, Matthias Troyer, and Guido Schmid
Phys. Rev. Lett. 94, 207202 – Published 23 May 2005

Abstract

We study the nature of the ground state of the two-dimensional extended boson Hubbard model on a square lattice by quantum Monte Carlo methods. We demonstrate that strong but finite on-site interaction U along with a comparable nearest-neighbor repulsion V result in a thermodynamically stable supersolid ground state for densities larger than 1/2, in contrast to fillings less than 1/2 or for very large U, where the checkerboard supersolid is unstable towards phase separation. We discuss the relevance of our results to realizations of supersolids using cold bosonic atoms in optical lattices.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 15 December 2004

DOI:https://doi.org/10.1103/PhysRevLett.94.207202

©2005 American Physical Society

Authors & Affiliations

Pinaki Sengupta1, Leonid P. Pryadko1, Fabien Alet2,3, Matthias Troyer2, and Guido Schmid2

  • 1Department of Physics, University of California, Riverside, California 92521, USA
  • 2Theoretische Physik, ETH Zürich, CH-8093 Zürich, Switzerland
  • 3Service de Physique Théorique (URA 2306 of CNRS), CEA Saclay, F-91191 Gif sur Yvette, France

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 94, Iss. 20 — 27 May 2005

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×