著者

塩足 亮隼 北口 雄也 奥山 弘 八田 振一郎 有賀 哲也

出版者

公益社団法人 日本表面科学会

雑誌

表面科学 (ISSN:03885321)

巻号頁・発行日

vol.33, no.7, pp.382-387, 2012-07-11 (Released:2012-07-25)

参考文献数

17

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Nitrogen monoxide (NO) has an unpaired electron in its 2π* orbital, giving rise to various reactivity such as dissociation and dimerization on the surfaces. One of the most important and frequently discussed issues has been whether its unpaired electron survives or not when adsorbed on metal surfaces; NO on metal surfaces is an ideal model system to study the interaction between molecular spin moment and condensed matters. We investigate the valence states of NO molecules adsorbed on Cu(110) with scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS). Two orthogonal 2π* valence states are observed at the Fermi level, suggesting that the unpaired electron of NO is alive and localized on the molecule. The covalent interactions between two NO molecules are visualized by manipulating the overlap of their “active” 2π* orbitals.

著者

有賀 哲也 八田 振一郎

出版者

日本真空協会

雑誌

Journal of the Vacuum Society of Japan (ISSN:18822398)

巻号頁・発行日

vol.52, no.11, pp.577-581, 2009

被引用文献数

3

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Recent studies on the Rashba effect on surfaces are reviewed. The Rashba effect refers to the k-dependent spin splitting of valence bands due to spin-orbit coupling in two-dimensional systems under out-of-plane electric field. After the physical mechanism of the Rashba effect is briefed, experimental and theoretical studies since the surface Rashba effect was first demonstrated for Au(111) in 1996 are surveyed with an emphasis placed on the microscopic origin of the giant Rashba spin splitting on surfaces covered with monolayer films of heavier elements. Most recently, giant Rashba spin splitting was realized on the surface of semiconductors, which serves a possibility of spintronic application of the surface Rashba effect.