期刊
PHYSICAL REVIEW LETTERS
卷 90, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.90.196602
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The anomalous Hall effect due to the spin chirality order and fluctuation is studied theoretically in a Kondo lattice model without the relativistic spin-orbit interaction. Even without the correlations of the localized spins, sigma(xy) can emerge depending on the lattice structure and the spin anisotropy. We reveal the condition for this chirality-fluctuation driven mechanism for sigma(xy). Our semiquantitative estimates for a pyrochlore oxide Nd2Mo2O7 give a finite sigma(xy) similar to 10 Omega(-1) cm(-1) together with a high resistivity rho(xx) similar to 10(-4)-10(-3) Omega cm, in agreement with experiments.
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