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Abstract:
Berry curvatures are computed for a set of Heusler compounds using
density functional calculations and the wave functions that they
provide. The anomalous Hall conductivity is obtained from the Berry
curvatures. It is compared with experimental values in the case of
Co2CrAl and Co2MnAl. A notable trend cannot be seen but the range of
values is quite enormous. The results for the anomalous Hall
conductivities and their large variations as well as the degree of the
spin polarization of the Hall current can be qualitatively understood by
means of the band structure and the Fermi-surface topology.
