WORK FUNCTION AND PHOTOTHRESHOLD OF LAYERED METAL DICHALCOGENIDES

Work functions and photothreshold values of various layered metal dich alcogenides (ZrSe2, HfSe2, NbSe2, 1T-TaS2, 2H-TaS2, MoS2, MoSe2, alpha -MoTe2, SnS2, SnSe2) have been measured by a photoemission technique. The measured photothreshold values, except for Sn compounds, are compa red with the calculated values based on various band models. The agree ment between the observed and calculated values is satisfactory for mo st of the materials.