Abstract
The nearest-neighbor Heisenberg spin glass in two and three dimensions is studied by means of a T=0 domain-wall renormalization-group method with a focus on the chiral ordering. In d=2 dimensions, both the spin and chiral components order at zero temperature with different correlation-length exponents, while d=3 appears to be just above the lower critical dimension of the chiral component ${\mathit{d}}_{\mathit{l}}^{(\mathit{c})}$, though the possibility that ${\mathit{d}}_{\mathit{l}}^{(\mathit{c})}$=3 cannot be ruled out. A chirality driven mechanism is proposed as a new possible mechanism of experimentally observed spin-glass transitions.
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