A simple linear analytic method for Brillouin zone integration of spectral functions in the complex energy plane
A simple linear analytic method for Brillouin zone integration of spectral functions in the complex energy plane
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复能面谱函数布里渊区积分的简单线性解析方法
DOI:
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发表时间:
1986
期刊:
影响因子:
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通讯作者:
P. E. Mijnarends
中科院分区:
文献类型:
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作者:
S. Kaprzyk;P. E. Mijnarends
A generalisation of the analytical tetrahedron method is given which allows the evaluation of spectral functions over the entire complex energy plane. Linear interpolation of both the matrix element and the dispersion relations leads to compact and transparent formulae which are free of singularities and well suited for automatic computation. An illustrative calculation is presented of the lattice Green function G(E) for the simple cubic lattice for Im E=0.001 and 0.1.