Observation of excitons in thin surface layers of CdS
Zuev V.A. , Korbutyak D.V. , Kurik M.V. , Litovchenko V.G., Rozhko A.Kh., Skubenko P.A.
Anomalies of the dispersion and the appearance of a new band in the spectrum of the reflection from the surface of a CdS single crystal bombarded with Ar40 have been observed, simultaneously with a sharp increase of the intensities (J2) of the emission of the band of excitons bound on Vs and of the electron-hole condensate in the surface layer (Ps band).