Journal
APPLIED PHYSICS LETTERS
Volume 82, Issue 22, Pages 3874-3876Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1581983
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The band gap of GaAsBi epitaxial layers as a function of bismuth concentration up to 3.6% is determined. The optical transitions were measured by modulated electroreflectance. The energy of the band gap decreases at a linearized rate of 88 meV/% Bi, or 83 meV/% Bi for the heavy hole to conduction band transition for GaAsBi strained to GaAs. The valence-band splitting increases faster than that of GaAs under similar compressive strain whereas the temperature dependence of the observed GaAsBi transitions is similar to that of GaAs. (C) 2003 American Institute of Physics.
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