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 CsMnBr3 reported by [V. P. Plakhty et al., Phys. Rev. Lett. 85, 3942 (2000)], providing further support for the continuous nature of the chiral transition.
|Autori:||Pelissetto, A; Rossi, Paolo; Vicari, Ettore|
|Titolo:||Chiral exponents in frustrated spin models with noncollinear ordering|
|Anno del prodotto:||2002|
|Digital Object Identifier (DOI):||10.1103/PhysRevB.65.020403|
|Appare nelle tipologie:||1.1 Articolo in rivista|