Optical charge transfer for the dope in GaAs
It is concluded that the chromium dope is amphoteric in behavior on the basis of the spectra, kinetics, and lux-ampere characteristics of the absorption and photoconductivity induced by 1.15-um IR laser radiation in high-resistance specimens of GaAs. It is assumed that the additional IR illumination produces optical charge transfer in the chromium in accordance with Cr/sup 3 +/3d/sup 3/ + h..nu.. ..-->.. Cr/sup 2 +/3d/sup 4/ + Cr/sup 4 +/3d/sup 2/. The photoneutralization of the Cr/sup 4 +/3d/sup 2/ centers is responsible for additional optical-absorption and photoconductivity bands appearing in the long-wave region. The kinetic equations for these centers are solved, which describes the experimental results satisfactorily. It is suggested that chromium may compensate not only shallow donors in GaAs but also shallow acceptors.
- Research Organization:
- Shevchenko University
- OSTI ID:
- 5955926
- Journal Information:
- Sov. Phys. J. (Engl. Transl.); (United States), Vol. 26:11; Other Information: Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 85-89, November, 1983
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHROMIUM
CHARGE TRANSPORT
PHOTOCONDUCTIVITY
GALLIUM ARSENIDES
ABSORPTIVITY
AFFINITY
BINDING ENERGY
CHARGE EXCHANGE
DOPED MATERIALS
ELECTRONS
INFRARED RADIATION
KINETIC EQUATIONS
LASER RADIATION
PHOTOIONIZATION
VALENCE
ARSENIC COMPOUNDS
ARSENIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
ENERGY
EQUATIONS
FERMIONS
GALLIUM COMPOUNDS
IONIZATION
LEPTONS
MATERIALS
METALS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PNICTIDES
RADIATIONS
TRANSITION ELEMENTS
360603* - Materials- Properties