X-ray photoelectron spectroscopy study of mixed-valence effects

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X-ray photoelectron spectroscopy study of mixed-valence effects. / Konstantinovic, Milan; Van den Berghe, Sven; Isobe, M; Ueda, Y; Al Mazouzi, Abderrahim (Peer reviewer).

In: Physical Review B, Vol. 72, 28.09.2005, p. 125124.

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@article{1917592ebc044e078291a527dc72ae98,
title = "X-ray photoelectron spectroscopy study of mixed-valence effects",
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%.",
keywords = "mixed-valence effects, NaxV2O5, XPS",
author = "Milan Konstantinovic and {Van den Berghe}, Sven and M Isobe and Y Ueda and {Al Mazouzi}, Abderrahim",
note = "Score = 10",
year = "2005",
month = sep,
day = "28",
language = "English",
volume = "72",
pages = "125124",
journal = "Physical Review B",
issn = "1098-0121",
publisher = "APS - American Physical Society",

}

RIS - Download

TY - JOUR

T1 - X-ray photoelectron spectroscopy study of mixed-valence effects

AU - Konstantinovic, Milan

AU - Van den Berghe, Sven

AU - Isobe, M

AU - Ueda, Y

A2 - Al Mazouzi, Abderrahim

N1 - Score = 10

PY - 2005/9/28

Y1 - 2005/9/28

N2 - 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%.

AB - 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%.

KW - mixed-valence effects

KW - NaxV2O5

KW - XPS

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_27257

UR - http://knowledgecentre.sckcen.be/so2/bibref/2925

M3 - Article

VL - 72

SP - 125124

JO - Physical Review B

JF - Physical Review B

SN - 1098-0121

ER -

ID: 137246