Critical behavior of frustrated spin models with noncollinear order - art.no. 140414

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