TY - JOUR
T1 - Electronic structure of a V2 O4 (A=Li, Zn, and Cd) studied by x-ray photoemission spectroscopy
AU - Takubo, K.
AU - Son, J. Y.
AU - Mizokawa, T.
AU - Ueda, H.
AU - Isobe, M.
AU - Matsushita, Y.
AU - Ueda, Y.
PY - 2006
Y1 - 2006
N2 - We have studied the electronic structure of the spinel-type V oxides LiV2 O4, ZnV2 O4, and CdV2 O4 using x-ray photoemission spectroscopy. The p - d charge-transfer energy was estimated from the valence-band spectra and the exchange interaction due to d - d transfer Tσ was found to be larger than that due to p - d transfer Tπ in these systems, consistent with the existing theoretical models. Based on the V 2p core-level spectra, we discuss the oxidation state of V ions in the surface region. Interestingly, only in ZnV2 O4 does the oxidation state of V ions strongly depend on the procedure of sample preparation.
AB - We have studied the electronic structure of the spinel-type V oxides LiV2 O4, ZnV2 O4, and CdV2 O4 using x-ray photoemission spectroscopy. The p - d charge-transfer energy was estimated from the valence-band spectra and the exchange interaction due to d - d transfer Tσ was found to be larger than that due to p - d transfer Tπ in these systems, consistent with the existing theoretical models. Based on the V 2p core-level spectra, we discuss the oxidation state of V ions in the surface region. Interestingly, only in ZnV2 O4 does the oxidation state of V ions strongly depend on the procedure of sample preparation.
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U2 - 10.1103/PhysRevB.74.155103
DO - 10.1103/PhysRevB.74.155103
M3 - Article
AN - SCOPUS:33749468343
SN - 1098-0121
VL - 74
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 15
M1 - 155103
ER -