TY - JOUR
T1 - Electronic phase transition in hollandite titanates BaxTi8 O16+δ
AU - Murata, R.
AU - Sato, T.
AU - Okuda, T.
AU - Horibe, Y.
AU - Tsukasaki, H.
AU - Mori, S.
AU - Yamaguchi, N.
AU - Sugimoto, K.
AU - Kawaguchi, S.
AU - Takata, M.
AU - Katsufuji, T.
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/12/14
Y1 - 2015/12/14
N2 - We studied the physical properties of hollandite titanates, BaxTi8O16+δ, which have double chains of edge-sharing TiO6 octahedra with d electrons in the t2g states. We found that there is an electronic phase transition at ∼220 K, at which various properties exhibit anomalies. This phase transition is characterized by a modulation in the TiO6 chains and a spectral weight transfer of over 2 eV in the optical conductivity spectrum, which are presumably caused by charge and orbital ordering of the Ti t2g electrons.
AB - We studied the physical properties of hollandite titanates, BaxTi8O16+δ, which have double chains of edge-sharing TiO6 octahedra with d electrons in the t2g states. We found that there is an electronic phase transition at ∼220 K, at which various properties exhibit anomalies. This phase transition is characterized by a modulation in the TiO6 chains and a spectral weight transfer of over 2 eV in the optical conductivity spectrum, which are presumably caused by charge and orbital ordering of the Ti t2g electrons.
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U2 - 10.1103/PhysRevB.92.220408
DO - 10.1103/PhysRevB.92.220408
M3 - Article
AN - SCOPUS:84950336439
SN - 0163-1829
VL - 92
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 22
M1 - 220408
ER -