Size effects in ultrathin Mg/W(110) films: Quantum electronic states

Quantum-size effects were studied in thin Mg films of submonolayer and monolayer thicknesses during their deposition on a W(110) single-crystal surface by angle-resolved photoelectron spectroscopy using synchrotron radiation. In the Mg/W(110) system, quantum electronic states were detected located within the allowed energy bands of the Mg(0001) structure. The quantum states are shifted toward the band boundaries as the Mg layer thickness increases. The energies of the quantum electronic states are analyzed using two approaches, namely, the general phase model and an extended phase model. It is established that both the models are in satisfactory agreement with experiment. However, the extended phase model is preferable for ultrathin adsorbate layers. Original Russian Text ? N.A. Vinogradov, D.E. Marchenko, A.M. Shikin, V.K. Adamchuk, O. Rader, 2009, published in Fizika Tverdogo Tela, 2009, Vol. 51, No. 1, pp. 168–177.