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Measuring the Charge State of an Adatom with Noncontact Atomic Force Microscopy

Gross, Leo ; Mohn, Fabian ; Liljeroth, Peter ; Repp, Jascha ; Giessibl, Franz J. ; Meyer, Gerhard



Abstract

Charge states of atoms can be investigated with scanning tunneling microscopy, but this method requires a conducting substrate. We investigated the charge-switching of individual adsorbed gold and silver atoms (adatoms) on ultrathin NaCl films on Cu(111) using a qPlus tuning fork atomic force microscope (AFM) operated at 5 kelvin with oscillation amplitudes in the subangstrom regime. Charging of ...

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