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Anisotropy of Optical and Electron Transport Properties of Atomic Ordering in CdGeAs2

Published online by Cambridge University Press:  10 February 2011

B. H. Bairamov ,
N. Fernelius ,
G. Irmer ,
J. Monecke ,
I. K. Polushina ,
R. Pandey ,
V.Yu. Rud' ,
Yu. V. Rud ,
P.G. Schunemann  and
M.C. Ohmer
B. H. Bairamov
Affiliation:
Department of Solid State Physics, A.F. Ioffe Physico-Technical Institute, Russian Academy of Sciences, 194021, 26 Polytekhnicheskaya ul., St. Petersburg, Russia, E-mail: [email protected]
N. Fernelius
Affiliation:
Air Force Research Laboratory, AFRL/MLPO, Wright-Patterson AFB 45433, OH, USA
G. Irmer
Affiliation:
Institute of Theoretical Physics, Freiberg University of Mining and Technology, Cottastr. 4, D-09596 Freiberg, Germany
J. Monecke
Affiliation:
Institute of Theoretical Physics, Freiberg University of Mining and Technology, Cottastr. 4, D-09596 Freiberg, Germany
I. K. Polushina
Affiliation:
Department of Solid State Physics, A.F. Ioffe Physico-Technical Institute, Russian Academy of Sciences, 194021, 26 Polytekhnicheskaya ul., St. Petersburg, Russia
R. Pandey
Affiliation:
Department of Physics, Michigan Technological University
V.Yu. Rud'
Affiliation:
Department of Physics, St. Petersburg State Technical University, 29 Polytekhnicheskaya uL, St. Petersburg 19525 1, Russia
Yu. V. Rud
Affiliation:
Department of Solid State Physics, A.F. Ioffe Physico-Technical Institute, Russian Academy of Sciences, 194021, 26 Polytekhnicheskaya ul., St. Petersburg, Russia
P.G. Schunemann
Affiliation:
Lockheed Sanders Inc., Nashua, 03061, NH, USA
M.C. Ohmer
Affiliation:
Air Force Research Laboratory, AFRL/MLPO, Wright-Patterson AFB 45433, OH, USA
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Abstract

Inelastic light scattering by optical phonons and the temperature dependent electrical conductivity, Hall constant and photosensitivity were studied in oriented CdGeAs2 crystals grown by ultra-low gradient freeze technique from near-stoichiometric melts. Observation of the clear polarization dependence of the inelastic light scattering spectra by optical phonons combined with the absence of any dependence of the intensity and frequency shift of the observed lines with mapping measurements in 300 μm steps indicated the high optical quality and homogeneity of these single crystals. It is shown that surface-barrier structures using these single crystals may be used as wide-band detectors for natural light, as well as selective photoanalyzers for linearly polarized radiation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 607: Symposium OO – Infrared Applications of Semiconductors III , 1999 , 397
Copyright
Copyright © Materials Research Society 2000

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