2024-03-29T10:26:14Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00026228
2023-01-16T04:16:43Z
320:321:322
Valence-Band Electronic Structures of High-Pressure-Phase PdF2-type Platinum-Group Metal Dioxides MO2 (M = Ru, Rh, Ir, and Pt)
Soda, Kazuo
Kobayashi, Daichi
Mizui, Tatsuya
Kato, Masahiko
Shirako, Yuichi
Niwa, Ken
Hasegawa, Masashi
Akaogi, Masaki
Kojitani, Hiroshi
Ikenaga, Eiji
Muro, Takayuki
open access
Copyright ©2018 The Physical Society of Japan 日本物理学会
The valence-band electronic structures of high-pressure-phase PdF2-type (HP-PdF2-type) platinum-group metal dioxides MO2 (M = Ru, Rh, Ir, and Pt) were studied by synchrotron radiation photoelectron spectroscopy and first-principles calculations. The obtained photoelectron spectra for HP-PdF2-type RuO2, RhO2, and IrO2 agree well with the calculated valence-band densities of states (DOSs) for these compounds, indicating their metallic properties, whereas the DOS of HP-PdF2-type PtO2 (calculated in the presence and absence of spin–orbit interactions) predicts that this material may be metallic or semimetallic, which is inconsistent with the electric conductivity reported to date and the charging effect observed in current photoelectron measurements. Compared with the calculated results, the valence-band spectrum of PtO2 appears to have shifted toward the high-binding-energy side and reveals a gradual intensity decrease toward the Fermi energy EF, implying a semiconductor-like electronic structure. Spin-dependent calculations predict a ferromagnetic ground state with a magnetization of 0.475 μB per formula unit for HP-PdF2-type RhO2.
ファイル公開:2019/04/15
日本物理学会
2018-04-15
eng
journal article
AM
http://hdl.handle.net/2237/00028432
https://nagoya.repo.nii.ac.jp/records/26228
https://doi.org/10.7566/JPSJ.87.044701
0031-9015
Journal of the Physical Society of Japan
87
4
044701
https://nagoya.repo.nii.ac.jp/record/26228/files/JPSJ_HAXPESMO2_soda_NUrepository.pdf
application/pdf
696.4 kB
2019-04-15