Abstract
X-ray photoelectron spectra of vanadium 2p states in NaV2O5 and LiV2O5, single crystals show
distinct splitting of both j=1/2 and j=3/2 spin-orbit lines due to the existence of V4+ and V5+ ions. In contrast
to LiV2O5, the NaV2O5 exhibits the disproportional intensities and larger binding energy difference of
(V4+)2p3/2 and (V5+)2p3/2 lines, that we attribute to a charge delocalization effect. By increasing the sodium
deficiency, both effects reduce in a very good agreement with a model that takes into account the relative
abundance of V4+ and V5+ ions, and the change of degree of delocalization.We estimate that sodium deficiency
of about 15% increases electron localization by about 0.4%.
Details
Original language | English |
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Pages (from-to) | 125124 |
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Journal | Physical Review B |
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Volume | 72 |
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Publication status | Published - 28 Sep 2005 |
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