|Author||McCluskey, M. D. ♦ Zhuravlev, K. K. ♦ Davidson, B. R. ♦ Newman, R. C.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|Publisher||The American Physical Society|
|Subject Keyword||CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ CARBON ♦ CONFIGURATION ♦ HYDROSTATICS ♦ IMPURITIES ♦ PRESSURE COEFFICIENT ♦ PRESSURE DEPENDENCE ♦ SPECTROSCOPY ♦ TRANSFORMATIONS|
|Abstract||Using infrared spectroscopy and a diamond-anvil cell, we have observed carbon and carbon-hydrogen local vibrational modes (LVM's) in InP at hydrostatic pressures as high as 5.5 GPa at liquid-helium temperatures. For pressures beyond 4.5 GPa, the carbon-hydrogen mode was not observed, perhaps as a result of a transformation of the complex into a different configuration. The LVM arising from carbon substitutional impurities varies linearly with pressure, whereas the shift of the carbon-hydrogen mode has a positive curvature. Both of these observations are in qualitative agreement with the pressure dependence of LVM's in GaAs. While the substitutional carbon impurities show very similar pressure shifts in the two materials, the linear pressure coefficient of the carbon-hydrogen stretch mode in InP is nearly three times that in GaAs. For all the measured modes, the Gru''neisen parameters increase with pressure.|
|Learning Resource Type||Article|
|Publisher Place||United States|
|Journal||Physical Review B|
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