Two-band second moment model for transition metals and alloys

Details Two-band second moment model for transition metals and alloys Two-band second moment model for transition metals and alloys

2005-05-03

arxiv.org/abs/cond-mat/0505060v1

Physics

Condensed Matter

Materials Science

Scientific paper

10.1016/j.jnucmat.2006.02.024

A semi-empirical formalism based on the second moment tight binding approach, considering two bands is presented for deriving interatomic potentials for magnetic d-band materials and transition metal alloys. It incorporates an empirical local exchange interaction, which accounts for magnetic effects without increasing the computing time required for force evaluation. The consequences of applying a two-band picture to transition metal alloys and transition metal impurities is examined, which combined with evidence from {\it ab initio calculations} leads to some surprisingly simplifying conclusions.

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