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Surface analysis of single-crystalline $$beta$$-FeSi$$_2$$

Yamada, Yoichi*; Mao, W.*; Asaoka, Hidehito  ; Yamamoto, Hiroyuki; Esaka, Fumitaka  ; Udono, Haruhiko*; Tsuru, Tomohito   

Clean surfaces of the single crystalline $$beta$$-FeSi$$_2$$ have been prepared and investigated. From XPS (X-ray Photoelectron Spectroscopy) measurements of the surface oxide, it is found that the surface Si is mainly oxidized while Fe isn't. After removing the surface oxide, clean surface can be obtained showing reasonable structure in LEED (Low-Energy Electron Diffraction) and STM (Scanning Tunneling Microscope). No drastic surface reconstruction is found reflecting strong Fe-Si bond. DFT (Density Functional Theory) calculation suggests the spin polarized surface DOS (Density Of State) when Fe comes at the surface.

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Category:Optics

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