Phys. Rev. B 14, 3569–3577 (1976)Study of the electronic local density of states using the cluster-Bethe-lattice method: Application to amorphous III-V semiconductorsReceived 22 December 1975; published in the issue dated 15 October 1976 The cluster-Bethe-lattice method is extended to study the Weaire-Thorpe sp3 Hamiltonian. We derive a transformation which makes it possible to calculate the local density of states of a system described with a four-orbital Hamiltonian by using the local Green's function of a one-orbital Hamiltonian. We study the effects on the density of states of the presence of like-atom bonds in amorphous III-V semiconductors. We analyze two models: (a) like-atom bond in tetrahedral configuration, and (b) like-atom bond in triangular pyramidal configuration. Our results are in agreement with the experimental data. © 1976 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.14.3569
DOI:
10.1103/PhysRevB.14.3569
PACS:
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