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Valence states and electronic structures of Co and Mn substituted spin gapless semiconductor PbPdO2.
- Source :
-
Applied Physics Letters . 1/13/2014, Vol. 104 Issue 2, p022411-1-022411-4. 4p. 1 Diagram, 3 Graphs. - Publication Year :
- 2014
-
Abstract
- Electronic structures of Pb(Pd0.9T0.1)O2 (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 (∼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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 104
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 93874249
- Full Text :
- https://doi.org/10.1063/1.4861883