Interactions of sulfur with graphite

Possible evidence for very high temperature superconductivity at the interface of sulfur and graphite in composite materials has been reported in the literature [1]. To examine better this possibility, we are studying the interfacial electronic properties of thin UHV deposited layers of sulfur and other overlayers on graphite and few-layer graphene by means of in-situ UPS and XPS. The results of this study and its implications for the possibility of superconductivity will be presented. [1] S. Moehlecke, Y. Kopelevich, and M. B. Maple, Phys. Rev. B 69, 134519 (2004).