WORK FUNCTION AND ELECTRONIC STRUCTURE OF Co OVERLAYERS ON THE ION SPUTTERED BASAL FACE OF MoS₂ SINGLE CRYSTAL

Work function and photoemission spectroscopy have been applied to the study of the interaction of Co overlayers with the ion sputtered basal face of MoS₂(0001). The experimental results show that upon Co deposition the work function of the MoS₂ substrate drops rapidly and reaches a minimum value of -0.65eV for ΔФ, and then increases to the metal Co work function at coverages greater than a monolayer. The Fermi level pinning at 2.2eV above the Mo 4d_z2 peak has been found at a low submonolayer coverage.