Abstract
We construct transferable tight-binding (TB) parameters for ferromagnetic and paramagnetic iron by fitting the total energy and the electronic band structure to three prototype crystal structures of Fe (BCC, both ferromagnetic and paramagnetic; and FCC, paramagnetic only) calculated by the general-potential linearized augmented plane wave (LAPW) method. We use these TB parameters to calculate the total energy and other properties of Fe in various other crystal structures, which we compare with independent LAPW results. The agreement between LAPW and TB results is very good, suggesting a realistic parametric physical description in the tight-binding approximation for any structure of Fe.
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