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Resonant soft X-ray emission spectroscopy of doped and undoped vanadium oxides

Schmitt, T; Duda, L C; Matsubara, M; Augustsson, A; Trif, Florentina LU ; Guo, J H; Gridneva, Lidia LU ; Uozumi, T; Kotani, A and Nordgren, J (2004) In Journal of Alloys and Compounds 362(1-2). p.143-150
Abstract
Resonant soft X-ray emission (RSXE) spectra of NaV2O5, MoxV1-xO2 and V2O3 have been recorded for a series of excitation energies at resonances of the V L- and O K-absorption band. Resonant excitation allows us, firstly, to separate V 3d and O 2p projected density-of-states of the valence band and, secondly, to study charge-neutral low-energy excitations due to resonant inelastic X-ray scattering (RIXS). We found that both the V L- and the O K-emission spectra clearly show components originating from O 2p- and V 3d-states, reflecting the high degree of hybridization of the valence band in all compounds. At threshold excitation we observed that NaV2O5 spectra are dominated by RIXS whereas MoxV1-xO2 and V2O3 spectra show bandlike features,... (More)
Resonant soft X-ray emission (RSXE) spectra of NaV2O5, MoxV1-xO2 and V2O3 have been recorded for a series of excitation energies at resonances of the V L- and O K-absorption band. Resonant excitation allows us, firstly, to separate V 3d and O 2p projected density-of-states of the valence band and, secondly, to study charge-neutral low-energy excitations due to resonant inelastic X-ray scattering (RIXS). We found that both the V L- and the O K-emission spectra clearly show components originating from O 2p- and V 3d-states, reflecting the high degree of hybridization of the valence band in all compounds. At threshold excitation we observed that NaV2O5 spectra are dominated by RIXS whereas MoxV1-xO2 and V2O3 spectra show bandlike features, which may be due to differences in the correlation effects of the compounds. We compared the RSXE spectra with cluster model calculations, which gives a good account for NaV2O5 whereas the RSXE spectra of the other compounds show RIXS only at certain energies well above the threshold. In fact, we interpret the trend in the RSXE spectra of the MoxV1-xO2 compound system as a successive filling of the (rigid) V 3d band with increasing Mo content. (C) 2003 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Synchrotron radiation (E), X-Ray spectroscopies (E), Crystal and ligand fields (D), Localized electronic states (D), Electronic band structure (D)
in
Journal of Alloys and Compounds
volume
362
issue
1-2
pages
143 - 150
publisher
Elsevier
external identifiers
  • wos:000187557200023
  • scopus:0345414972
ISSN
0925-8388
DOI
10.1016/S0925-8388(03)00575-9
language
English
LU publication?
yes
id
2fb465d3-0849-41f5-83e4-ce6a1a96d7cd (old id 139139)
date added to LUP
2007-07-03 16:40:21
date last changed
2017-05-07 04:22:38
@article{2fb465d3-0849-41f5-83e4-ce6a1a96d7cd,
  abstract     = {Resonant soft X-ray emission (RSXE) spectra of NaV2O5, MoxV1-xO2 and V2O3 have been recorded for a series of excitation energies at resonances of the V L- and O K-absorption band. Resonant excitation allows us, firstly, to separate V 3d and O 2p projected density-of-states of the valence band and, secondly, to study charge-neutral low-energy excitations due to resonant inelastic X-ray scattering (RIXS). We found that both the V L- and the O K-emission spectra clearly show components originating from O 2p- and V 3d-states, reflecting the high degree of hybridization of the valence band in all compounds. At threshold excitation we observed that NaV2O5 spectra are dominated by RIXS whereas MoxV1-xO2 and V2O3 spectra show bandlike features, which may be due to differences in the correlation effects of the compounds. We compared the RSXE spectra with cluster model calculations, which gives a good account for NaV2O5 whereas the RSXE spectra of the other compounds show RIXS only at certain energies well above the threshold. In fact, we interpret the trend in the RSXE spectra of the MoxV1-xO2 compound system as a successive filling of the (rigid) V 3d band with increasing Mo content. (C) 2003 Elsevier B.V. All rights reserved.},
  author       = {Schmitt, T and Duda, L C and Matsubara, M and Augustsson, A and Trif, Florentina and Guo, J H and Gridneva, Lidia and Uozumi, T and Kotani, A and Nordgren, J},
  issn         = {0925-8388},
  keyword      = {Synchrotron radiation (E),X-Ray spectroscopies (E),Crystal and ligand fields (D),Localized electronic states (D),Electronic band structure (D)},
  language     = {eng},
  number       = {1-2},
  pages        = {143--150},
  publisher    = {Elsevier},
  series       = {Journal of Alloys and Compounds},
  title        = {Resonant soft X-ray emission spectroscopy of doped and undoped vanadium oxides},
  url          = {http://dx.doi.org/10.1016/S0925-8388(03)00575-9},
  volume       = {362},
  year         = {2004},
}