Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2001-06-26
Phys.Rev. B65 (2002) 020403
Physics
Condensed Matter
Statistical Mechanics
4 pages
Scientific paper
10.1103/PhysRevB.65.020403
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.
Pelissetto Andrea
Rossi Paolo
Vicari Ettore
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