Effects of cation order on the energy bands of GaAs-AlAs heterostructures

W. Andreoni; A. Baldereschi; Roberto Car

doi:10.1016/0038-1098(78)90184-9

Effects of cation order on the energy bands of GaAs-AlAs heterostructures

W. Andreoni, A. Baldereschi, Roberto Car

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26 Scopus citations

Abstract

Pseudopotential band structure calculations of (GaAs)_n - (AlAs)_n with n = 1, 2, 3 and of Ga_0.5Al_0.5As show that the effects of cation order are small due to the weakness of the Ga-Al potential difference. The energy bands of the n = 1 heterostructure can be obtained by folding those of the alloy except for small energy shifts and splittings which can be handled in perturbation theory. The superlattice energy gap decreases with increasing n, the shrinkage being 4 meV for n = 2 and 10 meV for n = 3.

Original language	English (US)
Pages (from-to)	821-824
Number of pages	4
Journal	Solid State Communications
Volume	27
Issue number	9
DOIs	https://doi.org/10.1016/0038-1098(78)90184-9
State	Published - Sep 1978

All Science Journal Classification (ASJC) codes

General Chemistry
Condensed Matter Physics
Materials Chemistry

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10.1016/0038-1098(78)90184-9

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title = "Effects of cation order on the energy bands of GaAs-AlAs heterostructures",

abstract = "Pseudopotential band structure calculations of (GaAs)n - (AlAs)n with n = 1, 2, 3 and of Ga0.5Al0.5As show that the effects of cation order are small due to the weakness of the Ga-Al potential difference. The energy bands of the n = 1 heterostructure can be obtained by folding those of the alloy except for small energy shifts and splittings which can be handled in perturbation theory. The superlattice energy gap decreases with increasing n, the shrinkage being 4 meV for n = 2 and 10 meV for n = 3.",

author = "W. Andreoni and A. Baldereschi and Roberto Car",

note = "Funding Information: Acknowledg~e~£ - This research was supported in part by the Swiss National Science Foundation.",

year = "1978",

month = sep,

doi = "10.1016/0038-1098(78)90184-9",

language = "English (US)",

volume = "27",

pages = "821--824",

journal = "Solid State Communications",

issn = "0038-1098",

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TY - JOUR

T1 - Effects of cation order on the energy bands of GaAs-AlAs heterostructures

AU - Andreoni, W.

AU - Baldereschi, A.

AU - Car, Roberto

N1 - Funding Information: Acknowledg~e~£ - This research was supported in part by the Swiss National Science Foundation.

PY - 1978/9

Y1 - 1978/9

N2 - Pseudopotential band structure calculations of (GaAs)n - (AlAs)n with n = 1, 2, 3 and of Ga0.5Al0.5As show that the effects of cation order are small due to the weakness of the Ga-Al potential difference. The energy bands of the n = 1 heterostructure can be obtained by folding those of the alloy except for small energy shifts and splittings which can be handled in perturbation theory. The superlattice energy gap decreases with increasing n, the shrinkage being 4 meV for n = 2 and 10 meV for n = 3.

AB - Pseudopotential band structure calculations of (GaAs)n - (AlAs)n with n = 1, 2, 3 and of Ga0.5Al0.5As show that the effects of cation order are small due to the weakness of the Ga-Al potential difference. The energy bands of the n = 1 heterostructure can be obtained by folding those of the alloy except for small energy shifts and splittings which can be handled in perturbation theory. The superlattice energy gap decreases with increasing n, the shrinkage being 4 meV for n = 2 and 10 meV for n = 3.

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EP - 824

JO - Solid State Communications

JF - Solid State Communications

IS - 9

ER -

Effects of cation order on the energy bands of GaAs-AlAs heterostructures

Abstract

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