Exciton Spectra of Compound MoS2 by PAS Method at Room Temperature

Abstract

The Chevrel phase compounds including ternary compounds(1) had been well investigated in view to their high critical temperature superconductivity since seventies. In this concern it is reminiscent to call us to examine the structure of the excitonic spectra of MoS compounds, with important conception in mind in Little and Ginzburg sense.(2) In this paper we report we are able to reproduce the exciton spectra of 2H MoS2 at the absorption edge obtained by B.L. Evans and P. A. Young by conventional method at 77K(3), while ours by more sensitive photoacoustic spectroscopy method but at room temperature. It is easy to obtain the exciton spectra of the superconductive MoS compounds in studies of high Tc superconductive MoS cpmpounds at or near room temperature on this method.