布里渊区中的对称平均点

本文提出了一些布里渊区中的对称平均点,用它可以方便地计算布里渊区中的平均值,其精度可以和特殊点相比而计算量却要小得多。文内给出了立方和六角晶格的对称平均点,并用具体的数值计算例子说明了它的计算精度。关键词：

SYMMETRY AVERAGE POINTS IN THE BRILLOUIN ZONE

We present sets of symmetry average points in the Brillouin zone from which the average over the Brillouin zone of a periodic function of wave vector can be determined easily. The calculation accuracy is comparable to that of special points, but the calculation labour is reduced considerably. The symmetry average points for crystals with cubic and hexagonal Bravais lattices are given and the calculation accuracy is illustrated numerically through an real example.