Atomic-Scale Structure of Dislocations Revealed by Scanning Tunnelling Microscopy and Molecular Dynamics
| Autor: | Karl-Heinz Rieder, Jakob Schiøtz, Kai-Felix Braun, Jesper N Christiansen, Flemming Besenbacher, Karina Morgenstern, Karsten Wedel Jacobsen, Erik Lægsgaard |
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| Rok vydání: | 2001 |
| Předmět: |
Condensed Matter - Materials Science
Materials science Condensed matter physics General Physics and Astronomy AG(111) Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Spin polarized scanning tunneling microscopy Cross Slip Nanotechnology DISSOCIATION Atomic units law.invention Molecular dynamics Condensed Matter::Materials Science law METAL-SURFACES Surface structure Scanning tunneling microscope Dislocation |
| Zdroj: | Christiansen, J, Morgenstern, K, Schiøtz, J, Jacobsen, K W, Braun, K F, Rieder, K H, Laegsgaard, E & Besenbacher, F 2002, ' Atomic-scale structure of dislocations revealed by scanning tunneling microscopy and molecular dynamics ', Physical Review Letters, vol. 88, no. 20, pp. 206106 . https://doi.org/10.1103/PhysRevLett.88.206106 Christiansen, J, Morgenstern, K, Schiøtz, J, Jacobsen, K W, Braun, K-F, Rieder, K-H, Lægsgaard, E & Besenbacher, F 2002, ' Atomic-scale structure of dislocations revealed by scanning tunneling microscopy and molecular dynamics ', Physical Review Letters, vol. 88, pp. 206106 . |
| DOI: | 10.48550/arxiv.cond-mat/0110552 |
| Popis: | The intersection between dislocations and a Ag(111) surface has been studied using an interplay of scanning tunneling microscopy (STM) and molecular dynamics (MD). Whereas the STM provides atomically resolved information about the surface structure and Burgers vectors of the dislocations, the simulations can be used to determine dislocation structure and orientation in the near-surface region. In a similar way, the sub-surface structure of other extended defects can be studied. The simulations show dislocations to reorient the partials in the surface region leading to an increased splitting width at the surface, in agreement with the STM observations. Implications for surface-induced cross slip are discussed. Comment: 4 pages, RevTeX version 4, 4 figures included. Final version: title changed, discussion and figures improved |
| Databáze: | OpenAIRE |
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