Complex superstructure patterns near defect sites of carbon nanotubes and graphite
| Autor: | Marton C. Bein, Al. Darabont, Levente Tapasztó, Zoltán Osváth, L.P. Biró, Péter Nemes-Incze |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
Nanotechnology Carbon nanotube Condensed Matter Physics Molecular physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Condensed Matter::Materials Science Amplitude Interference (communication) law Atomic resolution Graphite Scanning tunneling microscope Superstructure (condensed matter) Fermi Gamma-ray Space Telescope |
| Zdroj: | Physica E: Low-dimensional Systems and Nanostructures. 40:2263-2267 |
| ISSN: | 1386-9477 |
| DOI: | 10.1016/j.physe.2007.09.122 |
| Popis: | Atomic resolution scanning tunneling microscope (STM) images of native and artificially created defect sites on graphite and carbon nanotubes were compared. The presence of position-dependent coexisting superstructure patterns was identified on all of the investigated samples. The results indicate that superstructure patterns are mainly determined by the available scattered states of the system rather than the detailed structure of the defect site. We propose an interference model, which can explain the presence of coexisting superstructures both on graphite and carbon nanotubes. The model predicts reduced corrugation amplitude for the case of graphite as compared to carbon nanotubes due to the wave-vector averaging on the Fermi circle. |
| Databáze: | OpenAIRE |
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