Structural investigation of the C-O complex in GaAs

A carbon-oxygen complex occurring in gallium arsenide crystals after annealing at around 700 °C is studied. Fourier transform infrared absorption measurements on the associated vibrational band at 2060 cm-1 under uniaxial stress reveal that the center has tetragonal symmetry. From the intensity of t...

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Bibliographische Detailangaben
Hauptverfasser: Ch, Alt H, Kersch, A, Wagner, H E
Format: Tagungsbericht
Sprache:eng
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Zusammenfassung:A carbon-oxygen complex occurring in gallium arsenide crystals after annealing at around 700 °C is studied. Fourier transform infrared absorption measurements on the associated vibrational band at 2060 cm-1 under uniaxial stress reveal that the center has tetragonal symmetry. From the intensity of the 18O-related satellite band it is concluded that four oxygen atoms are involved. Ab initio local density calculations show that a tetragonal CO4 molecule forms a stable entity in the gallium arsenide lattice.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4865620