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Direct observation of subsurface charge ordering in Fe3O4(001) by scanning tunneling microscopy/spectroscopy
| Title: | Direct observation of subsurface charge ordering in Fe3O4(001) by scanning tunneling microscopy/spectroscopy |
| Authors: | Hiura, Satoshi Browse this author | | Ikeuchi, Akira Browse this author | | Jochi, Masafumi Browse this author | | Yamazaki, Riku Browse this author | | Takahashi, Sotaro Browse this author | | Subagyo, Agus Browse this author | | Murayama, Akihiro Browse this author →KAKEN DB | | Sueoka, Kazuhisa Browse this author →KAKEN DB |
| Issue Date: | Apr-2017 |
| Publisher: | IOP Publishing |
| Journal Title: | Applied Physics Express (APEX) |
| Volume: | 10 |
| Issue: | 4 |
| Start Page: | 45701 |
| Publisher DOI: | 10.7567/APEX.10.045701 |
| Abstract: | 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. |
| Rights: | © 2017 The Japan Society of Applied Physics |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/68379 |
| Appears in Collections: | 情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 樋浦 諭志
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