Effects of steps and ordered defects on Cu(110) surface states
| العنوان: | Effects of steps and ordered defects on Cu(110) surface states |
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| المؤلفون: | D. Hesp, Richard Cole, Paul D. Lane, G. E. Isted, David Martin |
| المصدر: | Physical Review B. 87 |
| بيانات النشر: | American Physical Society (APS), 2013. |
| سنة النشر: | 2013 |
| مصطلحات موضوعية: | Materials science, Condensed matter physics, Scattering, Inverse photoemission spectroscopy, Surface finish, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, law.invention, Reflection (mathematics), law, Scanning tunneling microscope, Anisotropy, Vicinal, Surface states |
| الوصف: | The effects of steps and ordered defects on the surface states supported by Cu(110) terraces are investigated by a combination of reflection anisotropy spectroscopy (RAS) and scanning tunneling microscopy (STM). For several vicinal (110)-type surfaces, we measure the 2.1-eV RAS peak arising from transitions between surface states. A Poelsema-Comsa scattering model is used to relate the intensity of this RAS signal to the surface morphology (the distributions of terrace widths and step-edge roughness) observed by STM, providing a measure of the ability of the surface defects to scatter the Shockley-type surface state. A scattering cross section of area equivalent to 20 unit cells is obtained---a value consistent with previous results obtained from other types of defect for the Cu(110) surface. We find that the Poelsema-Comsa scattering model, originally developed for random distributions of defects, is also applicable to the modeling of RAS intensities of surfaces with ordered and partially ordered defects: specifically steps. Our results highlight the growing importance of the Poelsema-Comsa methodology in combination with RAS data for extracting topographic information associated with surface defects, particularly from surfaces in hostile environments, where RAS can access as a real-time in situ probe. |
| تدمد: | 1550-235X 1098-0121 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::ce9f3a0f8c71d65497537b40aaff40df https://doi.org/10.1103/physrevb.87.245405 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........ce9f3a0f8c71d65497537b40aaff40df |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 1550235X 10980121 |
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