Direct observation of oxygen superstructures in manganites

We report the observation of superstructures associated with the oxygen 2p states in two prototypical manganites using x-ray diffraction at the oxygen K edge. In the stripe order system Bi0.31Ca0.69MnO3, hole-doped O states are orbitally ordered, at the same propagation vector as the Mn orbital orde...

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Bibliographic Details
Published in:	Physical review letters Vol. 99; no. 20; p. 206403
Main Authors:	Grenier, S, Thomas, K J, Hill, J P, Staub, U, Bodenthin, Y, García-Fernández, M, Scagnoli, V, Kiryukhin, V, Cheong, S-W, Kim, B G, Tonnerre, J M
Format:	Journal Article
Language:	English
Published:	United States American Physical Society 16-11-2007
Subjects:	BISMUTH COMPOUNDS CALCIUM COMPOUNDS Condensed Matter CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY DOPED MATERIALS HOLES LANTHANUM COMPOUNDS MANGANATES MANGANESE OXIDES OXYGEN Physics Strongly Correlated Electrons STRONTIUM COMPOUNDS X-RAY DIFFRACTION manganite resonant x-ray diffraction
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Summary:	We report the observation of superstructures associated with the oxygen 2p states in two prototypical manganites using x-ray diffraction at the oxygen K edge. In the stripe order system Bi0.31Ca0.69MnO3, hole-doped O states are orbitally ordered, at the same propagation vector as the Mn orbital ordering, but no oxygen charge stripes are found at this periodicity. In La7/8Sr1/8MnO3, we observe a 2p charge ordering described by alternating hole-poor and hole-rich MnO planes that is consistent with some of the recent predictions.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0031-9007 1079-7114
DOI:	10.1103/physrevlett.99.206403