Augmented space recursion for partially disordered systems

Details Augmented space recursion for partially disordered systems Augmented space recursion for partially disordered systems

2001-07-12

arxiv.org/abs/cond-mat/0107245v1

Physics

Condensed Matter

Latex 2e, 21 Pages, 13 Figures, iopb style file attached

Scientific paper

10.1088/0953-8984/13/45/303

Off-stoichiometric alloys exhibit partial disorder, in the sense that only some of the sublattices of the stoichiometric ordered alloy become disordered. This paper puts forward a generalization of the augmented space recursion (ASR) (introduced earlier by one of us (Mookerjee et al 1997(*))) for systems with many atoms per unit cell. In order to justify the convergence properties of ASR we have studied the convergence of various moments of local density of states and other physical quantities like Fermi energy and band energy. We have also looked at the convergence of the magnetic moment of Ni, which is very sensitive to numerical approximations towards the k-space value 0.6 $\mu_{B}$ with the number of recursion steps prior to termination.

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