H. N. NAZARENO et al. : Density of States of a Binary Alloy 525 phys. stat. sol. (b) 146,525 (1988) . NAZAREN03) (a), I. FONSECA MORENO (a), R. M. RIBEIRO-TEIXEIRA (b), and J. R. IGLESIAS (b)A study is made of the electronic structure of a binary alloy in a Bethe lattice with coordination number 4. The basis set of orbitals sp3 was chosen thinking in the tetrahedral structure shown by most semiconductors. Short range order (SRO) correlation is included in the occupancy in the lattice. The results show a strong dependence of the density of states on the assumed values of the SRO parameter.Die Elektronenstruktur einer binaren Legierung wird in einem Bethegitter mit der Koordinationszahl vier untersucht. I n Anbetracht dessen, daS die meisten Halbleiter Tetraederstruktur zeigen, wird ein Basissatz von sps-Orbitalen gewiihlt. I n der Besetzung des Gitters wird Nahordnungs-(SR0)-Korrelation eingeschlossen. Die Ergebnisse zeigen eine strenge Abhangigkeit der Zustandsdichte von den angenommenen Werten der SRO-Parameter.
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