Tight-binding parameters from the full-potential linear muffin-tin orbital method: A feasibility study on NiAl

Details Tight-binding parameters from the full-potential linear muffin-tin orbital method: A feasibility study on NiAl Tight-binding parameters from the full-potential linear muffin-tin orbital method: A feasibility study on NiAl

2002-05-17

arxiv.org/abs/cond-mat/0205368v1

Physics

Condensed Matter

Materials Science

12 pages, RevTex, 5 figures

Scientific paper

We have examined a method of direct extraction of accurate tight-binding parameters from an ab-initio band-structure calculation. The linear muffin-tin potential method, in its full-potential implementation, has been used to provide the hamiltonian and overlap matrix elements in the momentum space. These matrix elements are Fourier transformed to real space to produce the tight-binding parameters. The feasibility of this method has been tested on the intermetallic alloy NiAl, using spd orbitals for each atom. The parameters generated for this alloy have been used as input to a real-space calculation of the local density of states using the recursion method.

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