Journal ArticleDOI
Energy band of ternary alloy semiconductors—Calculation by a coherent‐potential approximation based on the method of linear combination of bond orbitals
Shigeki Sakai,Takuo Sugano +1 more
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In this article, a method of calculating the effect of the random distribution of atoms on the energy-band structure of ternary alloy semiconductors is proposed, where the coherent potential approximation based on the method of linear combination of bond orbitals (LCBO) is used.Abstract:
A method of calculating the effect of the random distribution of atoms on the energy‐band structure of ternary alloy semiconductors is proposed, where the coherent‐potential approximation based on the method of linear combination of bond orbitals (LCBO) is used. In the case of GaAscP1−c, the nonlinear dependence of the energy upon the alloy composition c at various symmetry points within the first Brillouin zone is calculated. It is found that the effect of disorder is an important factor in explaining the bowing effect of band gaps; In particular, the magnitudes of the direct gap Γv15→Γc1, and the indirect gap Γv15→Xc1 agree well with experimental results. The energy‐band structure, including the lifetime broadening of the energy at each Bloch state, is shown for GaAs0.5P0.5. Also, the relation between the LCBO parameters and the effect of disorder on various states is qualitatively discussed. The effect of disorder on the p‐like or s‐like states of the valence band increases with increasing the differen...read more
Citations
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Journal ArticleDOI
Compound semiconductor alloys: From atomic-scale structure to bandgap bowing
TL;DR: In this article, experimental and theoretical studies of the atomic-scale structure of III-V and II-VI zincblende alloys and I-III-VI 2 chalcopyrite alloys are presented.
Journal ArticleDOI
Calculation of electronic spectra of A III B V compounds and solid solutions using model pseudopotentials
V. A. Chaldyshev,S. N. Grinyaev +1 more
Journal ArticleDOI
Electronic structure of III-V ternary semiconductors
V. B. Gera,Rita Gupta,K.P. Jain +2 more
TL;DR: In this article, the energy bands of the ternary alloys GaxIn1-xP, GaAs1-XPx, GaxAs 1-xAs and InAs1xPx were calculated in the coherent-potential approximation (CPA) using the tight-binding Hamiltonian.
Proceedings ArticleDOI
Fourier Analysis Of Optical Spectra: Application To Al x Ga 1-x As And GaAs 1-x P x
D. E. Aspnes,S. M. Kelso +1 more
TL;DR: In this paper, Fourier methods are applied to ellipsometrically measured pseudodielectric function spectra of the semiconductor alloy sequences AlxGal-xAs and GaAs1-xPx.
Journal ArticleDOI
On the concentration dependence of the direct and indirect band gaps of substitutional GaPxAs1−x alloys
R.L. Sakar,S.K. Chatterjee +1 more
TL;DR: In this paper, the variation of the direct and indirect band gaps of the substitutional GaP x As 1−x alloy with concentration has been studied by the KKRZ-ATA method and it is found that the gaps plotted against concentrations have little bowing on the low concentration side of GaP.
References
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Journal ArticleDOI
On the Non‐Orthogonality Problem Connected with the Use of Atomic Wave Functions in the Theory of Molecules and Crystals
TL;DR: In this article, the authors show that the overlap integrals are of essential importance in molecules and in crystals, instead of being negligible, and the problem is simply solved by considering the orthonormalized functions [open phi]μ, given by (21), as the real atomic orbitals.
Journal ArticleDOI
Band Structures and Pseudopotential Form Factors for Fourteen Semiconductors of the Diamond and Zinc-blende Structures
TL;DR: Pseudopotential form factors and band structures for 14 semiconductors of the diamond and zinc-blende structures were determined for 14 crystal types in this article, where the splitting of energy levels in the crystal were used.
Journal ArticleDOI
Quantum Dielectric Theory of Electronegativity in Covalent Systems. I. Electronic Dielectric Constant
TL;DR: In this paper, the Clausius-Mossotti theory of the electronic dielectric constant of diatomic crystals is extended to the case of the diamond, zincblende, wurtzite, and rock-salt types.
Journal ArticleDOI
Total valence-band densities of states of III-V and II-VI compounds from x-ray photoemission spectroscopy
TL;DR: In this paper, a comprehensive survey of the total valence-band x-ray-photo-emission spectra of 14 semiconductors is reported, including cubic GaP, GaAs, GaSb, InP, InAs, InSb InS, ZnS and CdSe are compared with UPS and theoretical band-structure results.
Journal ArticleDOI
Electronic Structures of Semiconductor Alloys
TL;DR: In this paper, the problem of the band structure of semiconductor alloy systems is treated by both the dielectric two-band method and by the use of an empirical (local) pseudopotential.
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