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On the quantitative characterization of chemical disorder of In 1− x Ga x P from wavelength‐modulated No‐phonon absorption
Author(s) -
Strehlow R.,
Kühn W.,
Friedrich H.,
Lange H.
Publication year - 1978
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220900118
Subject(s) - phonon , wavelength , lattice (music) , condensed matter physics , characterization (materials science) , spectral line , absorption spectroscopy , absorption (acoustics) , lattice constant , materials science , molecular physics , physics , optics , diffraction , quantum mechanics , acoustics
Wavelength‐modulated transmission spectra of the no‐phonon structure of In 1− x Ga x P are quantitatively analysed on the basis of a recently developed theory. From this comparison the Koster‐Slater parameter J characterizing the magnitude of chemical disorder is determined. The theory also well accounts for the experimentally observed lineshape of the no‐phonon structure. From the intensity ratio of the no‐phonon and LA‐phonon‐assisted transitions the quantity J/C is estimated where C is the deformation potential constant for lattice deformation by LA phonons.