Article Dans Une Revue Physical Review Letters Année : 2005

Supersolids versus phase separation in two-dimensional lattice bosons

Pinaki Sengupta
  • Fonction : Auteur
Leonid P. Pryadko
  • Fonction : Auteur

Résumé

We study the nature of the ground state of the strongly-coupled two dimensional extended boson Hubbard model on a square lattice. 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 just above half-filling, and that the checker-board crystal is unstable for smaller V, and for any V just below half-filling. The interplay between these two interaction energies results in a rich phase diagram which is studied in detail using quantum Monte Carlo methods.

Dates et versions

hal-00009288 , version 1 (30-09-2005)

Identifiants

Citer

Pinaki Sengupta, Leonid P. Pryadko, Fabien Alet, Matthias Troyer, Guido Schmid. Supersolids versus phase separation in two-dimensional lattice bosons. Physical Review Letters, 2005, 94, pp.207202. ⟨10.1103/PhysRevLett.94.207202⟩. ⟨hal-00009288⟩
149 Consultations
0 Téléchargements

Altmetric

Partager

  • More