Reflectivity and band structure of SnSe2

Abstract
The results of the normal-incidence reflectivity measurements performed between 3.8 and 28 eV on tin diselenide crystals (SnSe2) are given. The analysis of the reflectivity data according to band structure calculations and photoemission results (XPS and UPS) provides fundamental information about electron and optical properties of SnSe2. For the interpretation of the reflectivity structures the most probable direct interband transitions are proposed.