Vibronic interactions in molecules and crystals

摘要: Vibronic interaction effects constitute a new field of investigation in the physics and chemistry molecules crystals that combines all phenomena laws originating from mixing different electronic states by nuclear displacements. This is based on concept which goes beyond separate descriptions motions adiabatic approximation. Publications this topic often appear under title lahn-Thller effect, although area application approach much wider: term vibronic seems to be more appropriate as whole. The present understanding subject was reached only recently, during last quarter century. As result intensive development theory experiment, it shown nonadiabatic close-in-energy elec tronic displacements back influence modified structure dynamics series properties crystals. applications spectroscopy [including visible, ultraviolet, teractions cover full range frared, Raman, EPR, NMR, quadrupole resonance (NQR), gam ma (NOR), photoelectron x-ray spectroscopy], polarizability magnetic susceptibility, scattering phenomena, ideal impurity crystal (including structural well ferroelectric phase transitions), stereochemistry instability molecular biological) systems, mechanisms chemical reactions catalysis."