Local vibrational states in real crystals with impurities near the surface

Abstract

Local vibrational states (LVS) induced by a combined defect 'impurity-sample surface' are discussed. An analytical approximation for the basic characteristics of the LVS is derived. The approach developed can serve as an useful tool for the analysis of measured local frequencies and intensities of LVS, and can also be employed to gain information on the interatomic interactions and defect structure.