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.
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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 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 |
| URI: | https://discovery.ucl.ac.uk/id/eprint/59605 |
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