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- W2079343444 abstract "The electronic structures of a quantum well constructed from the binary alloy semiconductor A 1- x B x are studied by coherent potential approximation (CPA). A tight binding model is used for a single particle (electron, hole, or Frenkel exciton) in a well composed of a rectangular array of N x × N y × N z sites. The effects of diagonal randomness are included as the coherent potential Σ( E ), which is assumed to be the same for all sites, and is self-consistently determined with the average Green's function. For slab (∞,∞, N z ) and wire (∞, N y , N z ) structures, the energy density of states ρ( E ) is composed of N z (or N y × N z ) subbands with the remains of a two (one)-dimensional van-Hove singularity. When x (or 1- x ) is small, a B (A) impurity band always appears on the lower (higher) energy side of the lowest (highest) host subband. The metamorphosis of ρ( E ) and the absorption spectrum I ( E ) due to the creation of a Frenkel exciton by changing the well size and the dimensionality is extensively discussed." @default.
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- W2079343444 date "2006-11-01" @default.
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- W2079343444 title "Electronic Structures of Quantum Well of A<sub>1-x</sub>B<sub>x</sub> Alloy Semiconductor in Coherent Potential Approximation" @default.
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- W2079343444 doi "https://doi.org/10.1143/jjap.45.8733" @default.
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