X-RAY PHOTOELECTRON, EMISSION, AND ABSORPTION STUDIES OF THE ELECTRONIC-STRUCTURE OF MOLYBDENUM AND TUNGSTEN TRISULFIDES AND THEIR INTERCALATES

The electronic structure of molybdenum and tungsten trisulfides and th eir lithium intercalates is investigated by X-ray emission, absorption , and photoelectron spectroscopy. The electron density of lithium atom s intercalated into molybdenum and tungsten trisulfides is distributed over both the metal and sulfur atoms, with more over the atoms of the disulfide pair. These compounds are assumed to have an additional don or-acceptor bond involving a lone pair of disulfide sulfur atom electr ons and the vacant levels of the metal. A qualitative scheme of the el ectronic structure of MoS3 is constructed based on experimental result s and assuming the presence of a donor-acceptor bond.