期刊
PHYSICAL REVIEW LETTERS
卷 115, 期 15, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.115.157202
关键词
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资金
- National Science Foundation [DMR-1056536]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1056536] Funding Source: National Science Foundation
We introduce a simple model of SO(N) spins with two-site interactions which is amenable to quantum Monte Carlo studies without a sign problem on nonbipartite lattices. We present numerical results for this model on the two-dimensional triangular lattice where we find evidence for a spin nematic at small N, a valence-bond solid at large N, and a quantum spin liquid at intermediate N. By the introduction of a sign-free four-site interaction, we uncover a rich phase diagram with evidence for both first-order and exotic continuous phase transitions.
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