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General theory of microscopic dynamical response in surface probe microscopy: from imaging to dissipation.

Kantorovich, LN and Trevethan, T (2004) General theory of microscopic dynamical response in surface probe microscopy: from imaging to dissipation. Phys Rev Lett, 93 (23).

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Abstract

We present a general theory of atomistic dynamical response in surface probe microscopy when two solid surfaces move with respect to each other in close proximity, when atomic instabilities are likely to occur. These instabilities result in a bistable potential energy surface, leading to temperature dependent atomic scale topography and damping (dissipation) images. The theory is illustrated on noncontact atomic force microscopy and enables us to calculate, on the same footing, both the frequency shift and the excitation signal amplitude for tip oscillations. We show, using atomistic simulations, how dissipation occurs through reversible jumps of a surface atom between the minima when a tip is close to the surface, resulting in dissipated energies of 1.6 eV. We also demonstrate that atomic instabilities lead to jumps in the frequency shift that are smoothed out with increasing temperature.

Item Type: Article
Authors :
NameEmailORCID
Kantorovich, LNUNSPECIFIEDUNSPECIFIED
Trevethan, Tt.trevethan@surrey.ac.ukUNSPECIFIED
Date : 3 December 2004
Identification Number : 10.1103/PhysRevLett.93.236102
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:35
Last Modified : 17 May 2017 15:04
URI: http://epubs.surrey.ac.uk/id/eprint/835940

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