Direct observation of subsurface charge ordering in Fe3O4(001) by scanning tunneling microscopy/spectroscopy

Hiura, Satoshi; Ikeuchi, Akira; Jochi, Masafumi et al.

Applied Physics Express (APEX), 2017, 10(4), 45701

Permalink : https://hdl.handle.net/2115/68379

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アクセス権
open access
URI
https://hdl.handle.net/2115/68379
タイトル
Direct observation of subsurface charge ordering in Fe3O4(001) by scanning tunneling microscopy/spectroscopy
著者
Hiura, Satoshi ; Ikeuchi, Akira ; Jochi, Masafumi ; Yamazaki, Riku ; Takahashi, Sotaro ; Subagyo, Agus ; Murayama, Akihiro ; Sueoka, Kazuhisa
著者名
Hiura, Satoshi
著者名
Ikeuchi, Akira
著者名
Jochi, Masafumi
著者名
Yamazaki, Riku
著者名
Takahashi, Sotaro
著者名
Subagyo, Agus
e-Rad_Researcher
00333906
著者名
Murayama, Akihiro
e-Rad_Researcher
60250479
著者名
Sueoka, Kazuhisa
言語
英語
発行日
2017-04
出版者
IOP Publishing
収録物名
Applied Physics Express (APEX)
巻(号)
10(4)
ページ
45701
抄録
In this study, we characterized Fe3O4(001) films using scanning tunneling microscopy/spectroscopy (STM/STS). On the film surfaces, individual iron atoms and (root 2 x root 2)R45 degrees reconstructed structures were observed by STM. The STS results showed that the local density of states just below the Fermi level was higher in narrow sections than in wide sections of the surface reconstruction perpendicular to the iron rows. Periodic density of states modulations reproducing this electronic structure were clearly observed in the differential tunneling conductance map. These experimental results revealed the presence of subsurface charge ordering of Fe2+-Fe2+ and Fe3+-Fe3+ dimers, as proposed in previous density functional theory studies.
資源タイプ
学術雑誌論文
出版タイプ
Accepted Manuscript
権利情報
© 2017 The Japan Society of Applied Physics
PISSN
1882-0778
関連情報 (isVersionOf)
出版社版DOI
https://doi.org/10.7567/APEX.10.045701