Abstract
The quasi-one-dimensional and two-dimensional triangular lattice antiferromagnets give rise to new critical behavior which is due to an additional symmetry of chirality. Experiments performed recently on easy-axis and easy-plane compounds, notably specific-heat experiments of high accuracy, clearly demonstrate that critical exponents and amplitude ratios of the specific heat are in good agreement with predictions for chiral behavior. It is also possible to observe a crossover induced, e.g. by magnetic fields, from non-chiral to chiral universality classes.
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