Supersolid Order from Disorder: Hard-Core Bosons on the Triangular Lattice

Journal Article · Fri Sep 16 00:00:00 EDT 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.95.127207· OSTI ID:20699445

Melko, R G; Burkov, A A; Balents, L ^[1]; Paramekanti, A; Vishwanath, A ^[2]; Sheng, D N ^[3]

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1. Department of Physics, University of California, Santa Barbara, California 93106 (United States)
2. Department of Physics, University of California, Berkeley, California 94720 (United States)
3. Department of Physics and Astronomy, California State University, Northridge, California 91330 (United States)

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.

• OSTI ID: 20699445
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 95; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSONS
HELIUM
ORDER-DISORDER TRANSFORMATIONS
SOLIDS
SUPERFLUIDITY