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QND theory of long range forces in AFM on Au(111)
Author(s) -
Drakova D.,
Doyen G.
Publication year - 2005
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200541171
Subject(s) - atomic force microscopy , tungsten , range (aeronautics) , surface (topology) , front (military) , electron , atomic physics , particle (ecology) , chemistry , nanotechnology , condensed matter physics , physics , molecular physics , materials science , quantum mechanics , geometry , composite material , oceanography , geology , meteorology , mathematics , organic chemistry
The nature of the long range forces in atomic force microscopy (AFM) between a tungsten tip and the Au(111) surface is studied within Quantum Nano Dynamics (QND), treating many‐particle interactions and long range screening effects. A new mechanism of long range forces between a neutral tip and a metal surface is suggested due to the interaction with the image potential in the tip and the sample of a single electron localized on the Au(111) surface in front of the tip, in the presence of the AFM tip, and the image screening it provides.Force between a W‐tip and Au(111) – measured in AFM (circles and crosses, left‐hand axis, Ref. [1]) and calcu‐lated within QND theory (full curve, right‐hand axis). (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)