2005/05/31 by R. G. Melko, A. Paramekanti, A. A. Burkov +3 · 1 citation
Physics and Astronomy · #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.95.127207
published as Phys. Rev. Lett. 95, 127207 (2005) · 4 pages, 2 figures; finite-size scaling discussion added
arxiv created 2005/07/14 · arxiv updated 2009/12/01
We study the interplay of Mott localization, geometric frustration, and superfluidity for hard-core bosons with nearest-neighbor repulsion on the triangular lattice. For this model at half-filling, we demonstrate that superfluidity survives for arbitrarily large repulsion, and that diagonal solid order emerges in the strongly correlated regime from an order-by-disorder mechanism. This is thus an unusual example of a stable supersolid phase of hard-core lattice bosons at a commensurate filling.