Ferro-type orbital state in the mott transition system Ca2-xSrxRuO4 studied by the resonant x-ray scattering interference technique

M. Kubota, Y. Murakami, M. Mizumaki, H. Ohsumi, N. Ikeda, S. Nakatsuji, H. Fukazawa, Y. Maeno

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22 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number026401
JournalPhysical Review Letters
Volume95
Issue number2
DOIs
Publication statusPublished - Jul 8 2005
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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