Slip trace-induced terrace erosion
| Autor: | Christophe Coupeau, Benjamin Douat, Jérôme Colin, Francesco Montalenti, Joël Bonneville, Roberto Bergamaschini, M. Drouet |
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| Přispěvatelé: | Douat, B, Colin, J, Bergamaschini, R, Montalenti, F, Drouet, M, Bonneville, J, Coupeau, C |
| Rok vydání: | 2019 |
| Předmět: |
Surface diffusion
Chemical substance Materials science Plasticity Terrace evolution General Physics and Astronomy 02 engineering and technology Slip (materials science) 010402 general chemistry 01 natural sciences law.invention law Dislocation FIS/03 - FISICA DELLA MATERIA Condensed matter physics Surfaces and Interfaces General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics STM observation 0104 chemical sciences Surfaces Coatings and Films Scanning tunneling microscope 0210 nano-technology Vicinal |
| Zdroj: | Applied Surface Science. 466:454-458 |
| ISSN: | 0169-4332 |
| Popis: | We have investigated the interaction between slip traces and vicinal steps on the Nb(1 1 1) surface under increasing external strain. By exploiting an extended scanning tunneling microscopy analysis, we here show that emerging dislocations at the free-surface can induce the full disappearance of atomic terraces. To shed light on the observed behavior, we have modeled the elastic interaction between a screw dislocation and a vicinal step in the actual experimental configuration. After computing the adatom chemical potential, we show that strain-mediated diffusion on surface causes step erosion, possibly leading to vanishing of full terraces. |
| Databáze: | OpenAIRE |
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