Study of dispersive raman modes in Cu2O by resonant raman scattering

Abstract

We have observed shifts in energy of a number of Raman modes of Cu2O as a function of incident photon energy. We explain such energy shifts as due to dispersion in the phonons involved and obtain quantitative agreement between theory and experiment. From our data we have also determined the effective mass of the 1s yellow exciton in Cu2O to be (3.0±0.2)m0. © 1974 The American Physical Society.