Journal
PHYSICAL REVIEW B
Volume 75, Issue 19, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevB.75.195118
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In the present paper, by applying the reflection positivity method due to Dyson, Lieb, and Simon, we rigorously establish the existence of an antiferromagneticlike transverse orbital long-range order in the so-called two-dimensional 120 degrees model at zero temperature. Our result shows that, although this model has a built-in frustration mechanism which disfavors long-range orbital order, its effect is actually not sufficiently strong to destroy the existence of such ordering in the system.
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