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The atomic and electronic structure of the Pb-induced (√3 √3)R30 mosaic phase on Si(111) substrates has been studied by means of scanning tunneling microscopy (STM). A systematic voltage dependent STM imaging analysis combined with scanning tunneling spectroscopy measurements have enabled us to interpret the different height contrast between Si and Pb adatoms observed on STM images. This contrast...
Structure on the (001) surface of monoclinic WO 3 has been studied by scanning tunnelling microscopy. Electrostatic instability at the polar surface of WO 3 (001) is avoided by termination of the outer WO 2 layer with half a monolayer of oxygen ions to produce a (√2 √2)R45° arrangement of on-top oxygen. An additional periodicity is introduced in some terrace areas by tilting...
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