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Optical and electrical properties of type III HgTe/Hg1-xCdxTe heterostructures
Author(s): Charles R. Becker; X. C. Zhang; K. Ortner; V. Latussek; A. Pfeuffer-Jeschke
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Paper Abstract

By means of an optical investigation involving the envelope function approximation using the full 8 X 8 Kane Hamiltonian, it has been demonstrated that the valence band is primarily responsible for the separation between the H1- E1 and L1-E1 intersubband transition energies of semiconducting HgTe/Hg1-xCdxTe superlattices with a normal band structure. This results in an unequivocal determination of the valence band offset between HgTe and CdTe, (Lambda) , which is 570 +/- 60 meV at 5 K for both the (001) and the (112)B orientations. In order to correctly predict the temperature dependence of both intersubband transition energies, the following is required: (Lambda) is also temperature dependent according to d(Lambda) /dT equals -0.40 +/- 0.04 meV/K; the heavy hole effective mass has a significant temperature dependence; and the energy gap Eg(HgTe, 300 K)equals -160 +/- meV which is appreciably lower than the extrapolated values found in the literature.

Paper Details

Date Published: 29 November 2000
PDF: 7 pages
Proc. SPIE 4086, Fourth International Conference on Thin Film Physics and Applications, (29 November 2000); doi: 10.1117/12.408448
Show Author Affiliations
Charles R. Becker, Univ. Wuerzburg (Germany)
X. C. Zhang, Univ. Wuerzburg (Germany)
K. Ortner, Univ. Wuerzburg (Germany)
V. Latussek, Univ. Wuerzburg (Germany)
A. Pfeuffer-Jeschke, Univ. Wuerzburg (Germany)

Published in SPIE Proceedings Vol. 4086:
Fourth International Conference on Thin Film Physics and Applications
Junhao Chu; Pulin Liu; Yong Chang, Editor(s)

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