Equilibrium Shape of Steps and Islands on Polar II-VI Semiconductors Surfaces
| Autor: | Joël Eymery, Noël Magnea, D. Martrou |
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| Rok vydání: | 1999 |
| Předmět: | |
| Zdroj: | Physical Review Letters. 83:2366-2369 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.83.2366 |
| Popis: | Scanning tunneling microscopy studies of (001) surfaces of partially ionic II-VI compounds show novel surface structures with step and 2D island edges aligned along the $〈100〉$ crystallographic directions. We propose a simplified model incorporating electrostatic interactions in the calculation of the energy of charged steps that could explain why the free energy of $〈100〉$ steps lies below that of the $[110]$ and $[1\overline{1}0]$ steps. The energetics of the vicinal surfaces is strongly influenced by this original effect which makes possible the fabrication of staircase and checkerboard templates for growing self-organized nanostructures. |
| Databáze: | OpenAIRE |
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