TY - JOUR
T1 - Ferro-type orbital state in the mott transition system Ca2-xSrxRuO4 studied by the resonant x-ray scattering interference technique
AU - Kubota, M.
AU - Murakami, Y.
AU - Mizumaki, M.
AU - Ohsumi, H.
AU - Ikeda, N.
AU - Nakatsuji, S.
AU - Fukazawa, H.
AU - Maeno, Y.
PY - 2005/7/8
Y1 - 2005/7/8
N2 - We have succeeded in detecting ferro-type orbital states in Ca2-xSrxRuO4, which is the first outcome in a 4d Mott transition system by the resonant x-ray scattering interference technique. For x=0 (Mott insulator), the resonant signal for dxy orbital ordering is observed even at room temperature, in which the Jahn-Teller distortion is negligible. The signal disappears near the metal-insulator transition. On the other hand, in a metallic phase for x=0.5, orbital polarization with dyz/zx character dominates. With lowering temperature, the magnitude of the resonant signal slightly decreases owing to the additional influence of the γ band with dxy character.
AB - We have succeeded in detecting ferro-type orbital states in Ca2-xSrxRuO4, which is the first outcome in a 4d Mott transition system by the resonant x-ray scattering interference technique. For x=0 (Mott insulator), the resonant signal for dxy orbital ordering is observed even at room temperature, in which the Jahn-Teller distortion is negligible. The signal disappears near the metal-insulator transition. On the other hand, in a metallic phase for x=0.5, orbital polarization with dyz/zx character dominates. With lowering temperature, the magnitude of the resonant signal slightly decreases owing to the additional influence of the γ band with dxy character.
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U2 - 10.1103/PhysRevLett.95.026401
DO - 10.1103/PhysRevLett.95.026401
M3 - Article
AN - SCOPUS:27144458060
SN - 0031-9007
VL - 95
JO - Physical Review Letters
JF - Physical Review Letters
IS - 2
M1 - 026401
ER -