Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/3435
Título: | The effect of the STM tip on Si(100) reconstructed surfaces |
Autor(es): | Ramos, Marta M. D. Stoneham, A. M. Sutton, A. P. |
Palavras-chave: | Scanning tunneling microscopy CNDO method Si(001) Defects Energy |
Data: | Mai-1993 |
Editora: | IOP Publishing |
Revista: | Journal of Physics Condensed Matter |
Citação: | "Journal of Physics Condensed Matter". ISSN 2849-2858. 5:18 (1993) 2849-2858. |
Resumo(s): | 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. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/3435 |
ISSN: | 0953-8984 |
Versão da editora: | http://www.iop.org |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDF - FCT - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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repos-A08.pdf | JPCM5a | 1,11 MB | Adobe PDF | Ver/Abrir |