Emergence of undulating surface band upon oxygen adsorption of Fe thin film on W(110)

Seigo Souma; Kohei Honma; Takafumi Sato; Masahito Tsujikawa; Masafumi Shirai; Takashi Takahashi

doi:10.1063/1.5017484

Emergence of undulating surface band upon oxygen adsorption of Fe thin film on W(110)

Seigo Souma, Kohei Honma, Takafumi Sato, Masahito Tsujikawa, Masafumi Shirai, Takashi Takahashi

Tohoku University

Research output: Contribution to journal › Article › peer-review

Abstract

We have performed high-resolution angle-resolved photoemission spectroscopy of oxygen-adsorbed Fe thin films on W(110) to elucidate the evolution of electronic states upon surface oxidation. After oxygen adsorption of 0.25 monolayer onto Fe films, we found a surface state in the vicinity of the Fermi level which exhibits an undulating energy band dispersion. Our first-principles band-structure calculation indicates that this state is attributed to the spin-polarized minority band arising from the hybridization between Fe 3d and O 2p orbitals. The present result suggests that the observed surface state is related to the unusual magnetic properties of oxidized Fe surfaces.

Original language	English
Article number	241603
Journal	Applied Physics Letters
Volume	111
Issue number	24
DOIs	https://doi.org/10.1063/1.5017484
Publication status	Published - 2017 Dec 11

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title = "Emergence of undulating surface band upon oxygen adsorption of Fe thin film on W(110)",

abstract = "We have performed high-resolution angle-resolved photoemission spectroscopy of oxygen-adsorbed Fe thin films on W(110) to elucidate the evolution of electronic states upon surface oxidation. After oxygen adsorption of 0.25 monolayer onto Fe films, we found a surface state in the vicinity of the Fermi level which exhibits an undulating energy band dispersion. Our first-principles band-structure calculation indicates that this state is attributed to the spin-polarized minority band arising from the hybridization between Fe 3d and O 2p orbitals. The present result suggests that the observed surface state is related to the unusual magnetic properties of oxidized Fe surfaces.",

author = "Seigo Souma and Kohei Honma and Takafumi Sato and Masahito Tsujikawa and Masafumi Shirai and Takashi Takahashi",

note = "Funding Information: This work was supported by JSPS (KAKENHI: Grant Nos. JP15H02105, JP26287071, JP25287079, and JP15H05853). Publisher Copyright: {\textcopyright} 2017 Author(s).",

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doi = "10.1063/1.5017484",

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T1 - Emergence of undulating surface band upon oxygen adsorption of Fe thin film on W(110)

AU - Souma, Seigo

AU - Honma, Kohei

AU - Sato, Takafumi

AU - Tsujikawa, Masahito

AU - Shirai, Masafumi

AU - Takahashi, Takashi

PY - 2017/12/11

Y1 - 2017/12/11

N2 - We have performed high-resolution angle-resolved photoemission spectroscopy of oxygen-adsorbed Fe thin films on W(110) to elucidate the evolution of electronic states upon surface oxidation. After oxygen adsorption of 0.25 monolayer onto Fe films, we found a surface state in the vicinity of the Fermi level which exhibits an undulating energy band dispersion. Our first-principles band-structure calculation indicates that this state is attributed to the spin-polarized minority band arising from the hybridization between Fe 3d and O 2p orbitals. The present result suggests that the observed surface state is related to the unusual magnetic properties of oxidized Fe surfaces.

AB - We have performed high-resolution angle-resolved photoemission spectroscopy of oxygen-adsorbed Fe thin films on W(110) to elucidate the evolution of electronic states upon surface oxidation. After oxygen adsorption of 0.25 monolayer onto Fe films, we found a surface state in the vicinity of the Fermi level which exhibits an undulating energy band dispersion. Our first-principles band-structure calculation indicates that this state is attributed to the spin-polarized minority band arising from the hybridization between Fe 3d and O 2p orbitals. The present result suggests that the observed surface state is related to the unusual magnetic properties of oxidized Fe surfaces.

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Emergence of undulating surface band upon oxygen adsorption of Fe thin film on W(110)

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