2024-03-28T10:44:54Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/777992022-11-17T02:08:08Zhdl_2115_20053hdl_2115_145Electron-transfer-induced metallic electronic states in a H/Fe3O4(001) film subsurfaceHiura, SatoshiSubagyo, Agus1000000333906Murayama, Akihiro1000060250479Sueoka, Kazuhisaopen access© 2019 The Japan Society of Applied Physics540We investigate the local electronic properties of Fe atoms in a H/Fe3O4(001) film subsurface using scanning tunneling microscopy/spectroscopy (STS). Local barrier height measurements show a H-adsorption-induced reduction of the local work function, indicating electron transfer from H to surface atoms. The STS results and high-resolution spatial mapping of the occupied density of states near the Fermi level reveal that subsurface Fe atoms located beneath a OH group exhibit a metallic electronic state, different from the semiconducting state for intrinsic subsurface Fe atoms. These results can be explained by considering the extension of electron transfer to the subsurface layer. (c) 2019 The Japan Society of Applied PhysicsIOP Publishing2019-05engjournal articleAMhttp://hdl.handle.net/2115/77799https://doi.org/10.7567/1882-0786/ab10ce1882-0778AA12295133Applied Physics Express (APEX)125055502https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/77799/1/2019_Hiura_APEX.pdfapplication/pdf841.7 KB2019-05