1
|
Scholz R, Jancu JM, Bassani F. Superlattice Calculation in an Empirical spds* Tight-Binding Model. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-491-383] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTWe propose an empirical tight-binding method for tetrahedrally coordinated cubic materials and apply it to group IV and III-V semiconductors, extending existing calculations by the inclusion of all five d-orbitals per atom in the basis set. The symmetry character of the conduction states at the surface of the Brillouin zone is considerably improved compared to calculations in smaller bases, and the corresponding band positions can be obtained within the experimental uncertainties. Because the distance dependence of the tight-binding parameters is derived from deformation potentials, the model is particularly suited for an investigation of strained superlattices where the states at direct or pseudo-direct conduction band minima are composed of wavefunctions of all the minima at Γ, X, and L of the constituents. Investigations of GaAs/AlAs and short-period superlattices indicate a strong mixing between the conduction band valleys in the miniband structure, and the results are in better agreement with experiments than state-of-the-art empirical pseudopotential calculations.
Collapse
|
2
|
|
3
|
Friedland K, Hey R, Kostial H, Klann R, Ploog K. New Concept for the Reduction of Impurity Scattering in Remotely Doped GaAs Quantum Wells. PHYSICAL REVIEW LETTERS 1996; 77:4616-4619. [PMID: 10062583 DOI: 10.1103/physrevlett.77.4616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
4
|
Wen TD, Anastassakis E. Temperature dependence of strains and stresses in undercritical cubic superlattices and heterojunctions. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:4741-4751. [PMID: 9984035 DOI: 10.1103/physrevb.53.4741] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
5
|
Li GH, Goñi AR, Syassen K, Brandt O, Ploog K. State mixing in InAs/GaAs quantum dots at the pressure-induced Gamma -X crossing. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:18420-18425. [PMID: 9976278 DOI: 10.1103/physrevb.50.18420] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
6
|
Holtz M, Sauncy T, Ploog K, Tapfer L. Effects of hydrostatic pressure on the optic and transverse-acoustic vibrations of a (012) GaAs/AlAs superlattice. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:11057-11061. [PMID: 10007411 DOI: 10.1103/physrevb.48.11057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
7
|
Leroux M, Grandjean N, Chastaingt B, Deparis C, Neu G, Massies J. Confined electron states in ultrathin AlAs single quantum wells under pressure. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:11846-11853. [PMID: 10001200 DOI: 10.1103/physrevb.45.11846] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
8
|
Nunnenkamp J, Reimann K, Kuhl J, Ploog K. Pressure-induced Gamma -X electron-transfer rates in a (GaAs)15/(AlAs)5 superlattice. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:8129-8137. [PMID: 9998745 DOI: 10.1103/physrevb.44.8129] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
9
|
Reimann K, Holtz M, Syassen K, Lu YC, Bauser E. Pressure dependence of the indirect band gap of AlxGa1-xAs alloys (x=0.70 and 0.92) at low temperatures. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:2985-2990. [PMID: 9999889 DOI: 10.1103/physrevb.44.2985] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
10
|
Rossmanith M, Syassen K, Böckenhoff E, Ploog K. Thermionic emission across AlxGa1-xAs single barriers under hydrostatic pressure. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:3168-3174. [PMID: 9999912 DOI: 10.1103/physrevb.44.3168] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
11
|
Spain IL, Skolnick MS, Smith GW, Saker MK, Whitehouse CR. Photoluminescence spectroscopy in GaAs/AlAs superlattices as a function of temperature and pressure: The influence of sample quality. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 43:14091-14098. [PMID: 9997278 DOI: 10.1103/physrevb.43.14091] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|