DOI: 10.1103/physrevb.73.035431
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Abstract: Bulk carbon impurities segregate at the Fe͑100͒ surface and, upon thermal annealing, can form metastable surface phases, with local and long-range order, that show peculiar electronic properties. We present a surface science study of C-segregated Fe͑100͒ with scanning tunneling microscopy/spectroscopy ͑STM/STS͒, core level spectroscopy, and ab initio calculations of the surface structure. In particular, we investigate a c͑3 ͱ 2 ϫ ͱ 2͒ structure, observed for 0.67± 0.05 atomic layers of C segregated at the iron…

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