The critical behavior of frustrated spin models with noncollinear order

Details The critical behavior of frustrated spin models with noncollinear order The critical behavior of frustrated spin models with noncollinear order

2000-07-25

arxiv.org/abs/cond-mat/0007389v1

Phys.Rev. B63 (2001) 140414

Physics

Condensed Matter

Statistical Mechanics

4 pages, RevTex

Scientific paper

10.1103/PhysRevB.63.140414

We study the critical behavior of frustrated spin models with noncollinear order, including stacked triangular antiferromagnets and helimagnets. For this purpose we compute the field-theoretic expansions at fixed dimension to six loops and determine their large-order behavior. For the physically relevant cases of two and three components, we show the existence of a new stable fixed point that corresponds to the conjectured chiral universality class. This contradicts previous three-loop field-theoretical results but is in agreement with experiments.

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