QND theory of long range forces in AFM on Au(111)

Abstract

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)

Decoherence Mechanisms in Adsorbate Localization and Diffusion on Solid Surfaces

“…We use the philosophy and formalism of the Quantum Nano Dynamics (QND) theory, a field theoretical approach developed to treat correlated many particle systems [5,22,23]. In the present paper we are concerned with the coherent time evolution of the core motion of a single adsorbed atom entangled with the continuum of delocalized plane waves and the gravitational field provided by the surface atoms.…”

QND theory of long range forces in AFM on Au(111) [phys. stat. sol. (b) Vol. 242, No. 12, R103–R105 (2005)]

“…Due to a regrettable mistake in the production pro‐ cess, a passage on page R105 of 1, published online 18 August 2005, has not been given in the final corrected form. Preceding the concluding paragraph, the sentences have been given as follows:…”