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Orbital reconstruction in a self-assembled oxygen vacancy nanostructure [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy. Office of Basic Energy Sciences, 2015.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description:
Article numbers 12,402 : digital, PDF file
Additional Creators:
SLAC National Accelerator Laboratory, United States. Department of Energy. Office of Basic Energy Sciences, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
We demonstrate the microscopic role of oxygen vacancies spatially confined within nanometer inter-spacing (about 1nm) in BiFeO3, using resonant soft X-ray scattering techniques and soft X-ray spectroscopy measurements. Such vacancy confinements and total number of vacancy are controlled by substitution of Ca2+ for Bi3+ cation. We found that by increasing the substitution, the in-plane orbital bands of Fe3+ cations are reconstructed without any redox reaction. It leads to a reduction of the hopping between Fe atoms, forming a localized valence band, in particular Fe 3d-electronic structure, around the Fermi level. This band localization causes to decrease the conductivity of the doped BiFeO3 system.
Report Numbers:
E 1.99:1208656
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Note:
Published through SciTech Connect.
07/27/2015.
"srep12402"
Scientific Reports 5 ISSN 2045-2322 AM
Jang, H.; Kerr, G.; Lim, J.; Yang, C.; Kao, C.; Lee, J.
Funding Information:
AC02-76SF00515
View MARC record | catkey: 24066215