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Structure and spectroscopy of surface defects from scanning force spectroscopy: theoetical predictions

Kantorovich, LN; Shluger, AL; Stoneham, AM; (2000) Structure and spectroscopy of surface defects from scanning force spectroscopy: theoetical predictions. Physical Review Letters , 85 (18) 3845 - 3849. 10.1103/PhysRevLett.85.3846. Green open access

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Abstract

A possibility to study surface defects by combining noncontact scanning force microscopy (SFM) imaging with atomically resolved optical spectroscopy is demonstrated by modeling an impurity Cr3+ ion at the MgO(001) surface with a SFM tip. Using a combination of the atomistic simulation and the ab initio electronic structure calculations, we predict a topographic noncontact SFM image of the defect and show that its optical transitions can be either enhanced or suppressed depending on the tip atomistic structure and its position relative to the defect. These effects should allow identification of certain impurity species through competition between radiative and nonradiative transitions.

Type: Article
Title: Structure and spectroscopy of surface defects from scanning force spectroscopy: theoetical predictions
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.85.3846
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.85.3846
Language: English
Additional information: © 2000 The American Physical Society
Keywords: DEFECTS, Force, Physics, PREDICTION, PREDICTIONS, spectroscopy, Structure, SURFACE, Surface defects
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/24754
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