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Chiral exponents in frustrated spin models with noncollinear ordering

Andrea Pelissetto·Paolo Rossi·Ettore Vicari
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Abstract

We compute the chiral critical exponents for the chiral transition in frustrated two- and three-component spin systems with noncollinear order, such as stacked triangular antiferromagnets (STA). For this purpose, we calculate and analyze the six-loop field-theoretical expansion of the renormalization-group function associated with the chiral operator. The results are in satisfactory agreement with those obtained in the recent experiment on the XY STA CsMnBr_3 reported by V. P. Plakhty et al., Phys. Rev. Lett. 85, 3942 (2000), providing further support for the continuous nature of the chiral transition.

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Andrea Pelissetto, Paolo Rossi, Ettore Vicari. 2001-06-26. Chiral exponents in frustrated spin models with noncollinear ordering. https://doi.org/10.1103/physrevb.65.020403

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