Journal
JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS
Volume 105, Issue 5, Pages 1011-1017Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/S1063776107110131
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Several Monte Carlo algorithms are used to examine the critical behavior of the 3D frustrated Heisenberg model on stacked triangular lattice with variable interlayer exchange coupling for values of the interlayer-to-intralayer exchange ratio R = vertical bar J'vertical bar J vertical bar in the interval between 0.01 and 1.0. A finite-size scaling technique is used to calculate the static magnetic and chiral critical exponents alpha (specific heat), gamma and gamma(k) (susceptibility), beta and beta k (magnetization), nu and nu k (correlation length), and the Fisher exponent eta. It is shown that 3D frustrated Heisenberg models on stacked triangular lattice with R > 0.05 constitute a new universality class of critical behavior. At lower R, a crossover from 3D to 2D critical behavior is observed.
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