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O: Oberflächenphysik

O 15: Postersitzung (Adsorption an Oberfl
ächen, Epitaxie und Wachstum, Organische Dünnschichten, Oxide und Isolatoren, Rastersondentechniken, Zeitaufgelöste Spektroskopie, Methoden)

O 15.23: Poster

Friday, March 4, 2005, 17:00–20:00, Poster TU D

New phases of NaCl monolayers on Ag(100) — •Hans-Christoph Ploigt, François Patthey, Marina Pivetta, and Wolf-Dieter Schneider — Institut de Physique des Nanostructures, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland

We used low-temperature scanning tunneling microscopy and scanning tunneling spectroscopy to characterise the growth mode of ultrathin NaCl layers on cold Ag(100) substrates. NaCl was evaporated from a Knudsen cell at substrate temperatures between 0 ^∘C and -120 ^∘C. As a function of decreasing temperature three different atomic arrangements for a NaCl monolayer were found: (i) the square structure of the NaCl(100) plane, (ii) an oblique lattice and (iii) a hexagonal lattice.