Valence States and Electronic Structures of Co and Mn Substituted Spin Gapless Semiconductor PbPdO2
SCIE
SCOPUS
- Title
- Valence States and Electronic Structures of Co and Mn Substituted Spin Gapless Semiconductor PbPdO2
- Authors
- Kim, DH; Hwang, J; Lee, E; Lee, KJ; Choo, SM; Jung, MH; Baik, J; Shin, HJ; Kim, B; Kim, K; Min, BI; Kang, JS
- Date Issued
- 2014-01-13
- Publisher
- AIP
- Abstract
- Electronic structures of Pb(Pd0.9T0.1)O-2 (T = Mn, Co) spin gapless semiconductors have been investigated by employing soft X-ray absorption spectroscopy (XAS) and photoemission spectroscopy (PES). The valence states of Co and Mn ions are found to be mixed-valent (similar to 2.7) and tetravalent, respectively. The measured valence-band PES and O 1s XAS spectra show that both PbPdO2 and PbPd0.9Co0.1O2 are small-gap semiconductors. This finding is supported by the calculated band structures, obtained in the density functional theory with the modified Becke-Johnson potential (mBJ) scheme. This work also shows evidence for the existence of the phase separation in Mn-substituted PbPd0.9Mn0.1O2. (C) 2014 AIP Publishing LLC.
- Keywords
- TRANSITION-METAL COMPOUNDS; ABSORPTION
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/13097
- DOI
- 10.1063/1.4861883
- ISSN
- 0003-6951
- Article Type
- Article
- Citation
- APPLIED PHYSICS LETTERS, vol. 104, no. 2, page. 22411 - 22411, 2014-01-13
- Files in This Item:
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