Abstract
The influence of uniaxial pressure (0 < P < 2600 kg/cm♪2) on the intrinsic photoconductivity (PC) spectrum of p-InSb at 93 and 15°K is investigated. At 77°K the carrier concentration and mobility in the specimens were, respectively, (1.4−3.2)·1014 cm−3 and ∼7000 cm2/V. sec. It is established that the maximum in the PC(Em) spectra under compression is shifted towards higher energies. In the low-compression range ∂Em/∂P=5·10−6eV·cm2/kg, while ∂Em/∂P=1·10−6eV·cm2/kg for P > 1000 kg/cm2. It is shown that the shift of the maximum of the intrinsic PC spectra with pressure is due to the growC;th in the forbidden bandwidth (Eg), and the change in parameters characterizing carrier diffusion in the specimen bulk (the diffusion coefficient, lifetime, surface recombination velocity) plays no part. The change in ∂Em/∂P with pressure is explained by the influence of valence band splitting. The deformation potential constants of the valence band |b|=(1.7±0.3) eV and |d|=(4.4±0.8)eV are calculated on the basis of a comparison between experimentally obtained data and theoretical results.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 2, pp. 159–162, February, 1976.
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Valyashko, E.G., Koshelev, O.G. & Pleskacheva, T.B. Determination of the strain potential constant by means of the p-InSb photoconductivity spectra under uniaxial compression. Soviet Physics Journal 19, 263–266 (1976). https://doi.org/10.1007/BF00942880
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DOI: https://doi.org/10.1007/BF00942880