TY - JOUR
T1 - V-V dimerization effects on bulk-sensitive hard x-ray photoemission spectra for Magnéli phase vanadium oxides
AU - Obara, M.
AU - Sekiyama, A.
AU - Imada, S.
AU - Yamaguchi, J.
AU - Miyamachi, T.
AU - Balashov, T.
AU - Wulfhekel, W.
AU - Yabashi, M.
AU - Tamasaku, K.
AU - Higashiya, A.
AU - Ishikawa, T.
AU - Fujiwara, K.
AU - Takagi, H.
AU - Suga, S.
PY - 2010/3/22
Y1 - 2010/3/22
N2 - Highly bulk-sensitive hard x-ray photoemission has been performed for the Magnéli phase V5 O9 and V6 O11, which are composed of V2 O3 and VO2 from chemical point of view. The valence-band spectra near the Fermi level are rather similar between V5 O9 and V6 O11 in both metallic and insulating phases. Although the core-level spectra in the metallic phase are similar between V5 O9 and V6 O11, the core-level spectra in the insulating phase are noticeably different. Our results are understood by considering the contribution of the V-V dimerization effects, which are strong in V6 O11 and negligible in V5 O9. Comparison of the core-level spectra of V5 O9 and V6 O11 with those of VO2 has revealed that the mechanism of the metal-insulator transitions for the former two compounds is different from that for VO2.
AB - Highly bulk-sensitive hard x-ray photoemission has been performed for the Magnéli phase V5 O9 and V6 O11, which are composed of V2 O3 and VO2 from chemical point of view. The valence-band spectra near the Fermi level are rather similar between V5 O9 and V6 O11 in both metallic and insulating phases. Although the core-level spectra in the metallic phase are similar between V5 O9 and V6 O11, the core-level spectra in the insulating phase are noticeably different. Our results are understood by considering the contribution of the V-V dimerization effects, which are strong in V6 O11 and negligible in V5 O9. Comparison of the core-level spectra of V5 O9 and V6 O11 with those of VO2 has revealed that the mechanism of the metal-insulator transitions for the former two compounds is different from that for VO2.
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U2 - 10.1103/PhysRevB.81.113107
DO - 10.1103/PhysRevB.81.113107
M3 - Article
AN - SCOPUS:77954979493
VL - 81
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 11
M1 - 113107
ER -