On the Theory of the Effects of Hydrostatic Pressure on the Optical Spectra of Impurities in Solids
We consider some fundamental aspects of the theory of the effects of hydrostatic pressure on the optical absorption and luminescent emission spectra of impurities in solids. The early theoretical work within the adiabatic approximation is extended, maintaining separation of the effects of pressure on the distribution of nuclear configurations for the initial electronic state for the transition from the effects of pressure on the transition energy for each configuration. Some errors in recent publications are noted, particularly regarding the conditions for linear dependence on pressure of the peaks for the phonon-assisted transitions. Extension of the theory to systems with vibronic structure is considered.
KeywordsHydrostatic Pressure Pressure Dependence Harmonic Approximation Adiabatic Approximation Occupational Probability
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