Block recursion and Green matrices

Details Block recursion and Green matrices Block recursion and Green matrices

2004-09-15

arxiv.org/abs/cond-mat/0409387v1

Physics

Condensed Matter

Materials Science

16 pages, 8 figures

Scientific paper

We present here generalization of the recursion method of Haydock et al [1] for the calculation of Green matrices (in angular momentum space). Earlier approaches concentrated on the diagonal elements, since the focus was on spectral densities. However, calculations of configuration averaged response functions or neutron scattering cross-sections require the entire Green matrices and self-energy matrices obtained from it. This necessitated the generalization of the recursion method presented here with examples.

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