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

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

doi:10.1063/1.4861883

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

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

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Abstract

Electronic structures of Pb(Pd_0.9T_0.1)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 PbPd_0.9Co_0.1O ₂ 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 PbPd _0.9Mn_0.1O₂.

Original language	English
Article number	022411
Journal	Applied Physics Letters
Volume	104
Issue number	2
DOIs	https://doi.org/10.1063/1.4861883
State	Published - 13 Jan 2014

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@article{27b6ea75e8f24408a56fa71bf089b1de,

title = "Valence states and electronic structures of Co and Mn substituted spin gapless semiconductor PbPdO2",

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 PbPd0.9Co0.1O 2 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 PbPd 0.9Mn0.1O2.",

author = "Kim, {D. H.} and Jihoon Hwang and Eunsook Lee and Lee, {K. J.} and Choo, {S. M.} and Jung, {M. H.} and J. Baik and Shin, {H. J.} and Bongjae Kim and Kyoo Kim and Min, {B. I.} and Kang, {J. S.}",

year = "2014",

month = jan,

day = "13",

doi = "10.1063/1.4861883",

language = "English",

volume = "104",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

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TY - JOUR

T1 - Valence states and electronic structures of Co and Mn substituted spin gapless semiconductor PbPdO2

AU - Kim, D. H.

AU - Hwang, Jihoon

AU - Lee, Eunsook

AU - Lee, K. J.

AU - Choo, S. M.

AU - Jung, M. H.

AU - Baik, J.

AU - Shin, H. J.

AU - Kim, Bongjae

AU - Kim, Kyoo

AU - Min, B. I.

AU - Kang, J. S.

PY - 2014/1/13

Y1 - 2014/1/13

N2 - 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 PbPd0.9Co0.1O 2 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 PbPd 0.9Mn0.1O2.

AB - 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 PbPd0.9Co0.1O 2 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 PbPd 0.9Mn0.1O2.

UR - http://www.scopus.com/inward/record.url?scp=84893110537&partnerID=8YFLogxK

U2 - 10.1063/1.4861883

DO - 10.1063/1.4861883

M3 - Article

AN - SCOPUS:84893110537

SN - 0003-6951

VL - 104

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 2

M1 - 022411

ER -

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

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