Ferro-type orbital state in the Mott transition system Ca2-xSrxRuO4 studied by the resonant x-ray scattering interference technique.
Phys Rev Lett
; 95(2): 026401, 2005 Jul 08.
Article
de En
| MEDLINE
| ID: mdl-16090704
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 d(xy) 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 d(yz/zx) character dominates. With lowering temperature, the magnitude of the resonant signal slightly decreases owing to the additional influence of the gamma band with d(xy) character.
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Collection:
01-internacional
Base de données:
MEDLINE
Langue:
En
Journal:
Phys Rev Lett
Année:
2005
Type de document:
Article
Pays d'affiliation:
Japon