Valence states and electronic structures of Co and Mn substituted spin gapless semiconductor PbPdO2

Kim, D. H.; Hwang, Jihoon; Lee, Eunsook; Lee, K. J.; Choo, S. M.; Jung, M. H.; Baik, J.; Shin, H. J.; Kim, Bongjae; Kim, Kyoo; Min, B. I.; Kang, J. -S.

doi:10.1063/1.4861883

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Valence states and electronic structures of Co and Mn substituted spin gapless semiconductor PbPdO2

Kim, D. H.;
Hwang, Jihoon;
Lee, Eunsook;
Lee, K. J.;
Choo, S. M.;
... Jung, M. H.;
외 6명

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초록

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.

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TRANSITION-METAL COMPOUNDS; ABSORPTION

제목: Valence states and electronic structures of Co and Mn substituted spin gapless semiconductor PbPdO2

저자: Kim, D. H.; Hwang, Jihoon; Lee, Eunsook; Lee, K. J.; Choo, S. M.; Jung, M. H.; Baik, J.; Shin, H. J.; Kim, Bongjae; Kim, Kyoo; Min, B. I.; Kang, J. -S.

DOI: 10.1063/1.4861883

발행일: 2014-01-13

유형: Article

저널명: Applied Physics Letters

권: 104

호: 2