Bulk carbon impurities segregate at the Fe(1 0 0) surface and, upon thermal annealing, can form metastable surface phases with local and long range order and peculiar electronic properties. We present a surface science study of C-segregated Fe(1 0 0) with scanning tunneling microscopy, angle resolved photoemission, and ab initio calculations of the surface structure and electron states. In particular the c(3â2 Ã â2) structure, observed for 0.67 atomic layers of C segregated at the iron surface, is found to be due to self-organized carbon stripes made of zig-zag chains. The strong hybridization between C and Fe was observed in ARPES spectra.
C-Fe chains due to segregated carbon impurities on Fe(1 0 0) / J. Fujii, G. Panaccione, I. Vobornik, G. Rossi, G. Trimarchi, N. Binggeli. - In: SURFACE SCIENCE. - ISSN 0039-6028. - 600:18(2006), pp. 3884-3887. (Intervento presentato al 23. convegno European Conference on Surface Science (ECOSS-23) tenutosi a Berlin nel 2005) [10.1016/j.susc.2006.01.097].
C-Fe chains due to segregated carbon impurities on Fe(1 0 0)
G. Rossi;
2006
Abstract
Bulk carbon impurities segregate at the Fe(1 0 0) surface and, upon thermal annealing, can form metastable surface phases with local and long range order and peculiar electronic properties. We present a surface science study of C-segregated Fe(1 0 0) with scanning tunneling microscopy, angle resolved photoemission, and ab initio calculations of the surface structure and electron states. In particular the c(3â2 Ã â2) structure, observed for 0.67 atomic layers of C segregated at the iron surface, is found to be due to self-organized carbon stripes made of zig-zag chains. The strong hybridization between C and Fe was observed in ARPES spectra.File | Dimensione | Formato | |
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