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THE EFFECT OF THE STM TIP ON SI(100) RECONSTRUCTED SURFACES

RAMOS, MMD; STONEHAM, AM; SUTTON, AP; (1993) THE EFFECT OF THE STM TIP ON SI(100) RECONSTRUCTED SURFACES. J PHYS-CONDENS MAT , 5 (18) 2849 - 2858. 10.1088/0953-8984/5/18/006. Green open access

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Abstract

We present a theoretical study of the effects of the STM tip on the geometry of Si(100) reconstructed surfaces. The energy barrier to switching between different reconstructions is also discussed. We use a molecular dynamics method and self-consistent forces to simulate the time-dependent behaviour of the surface atoms. The molecular orbital calculations are performed at the CNDO level using a cluster model. Our results indicate significant differences for positively and negatively biased tips. The thermally induced rocking of surface dimers is inhibited by the application of a positive bias to the tip and it is promoted by a negative bias. These bias-dependent effects may offer a plausible explanation for the bias dependence of STM images of this surface.

Type: Article
Title: THE EFFECT OF THE STM TIP ON SI(100) RECONSTRUCTED SURFACES
Open access status: An open access version is available from UCL Discovery
DOI: 10.1088/0953-8984/5/18/006
Publisher version: http://dx.doi.org/10.1088/0953-8984/5/18/006
Language: English
Additional information: Text made available to UCL Discovery by kind permission of IOP Publishing, 2012
Keywords: SCANNING TUNNELING MICROSCOPY, CNDO METHOD, SI(001), DEFECTS, ENERGY
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 > London Centre for Nanotechnology
URI: https://discovery.ucl.ac.uk/id/eprint/59605
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