Direct Observation of Oxygen Superstructures in Manganites

Journal Article · Fri Nov 16 00:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.99.206403· OSTI ID:21024478

Grenier, S; Tonnerre, J M ^[1]; Thomas, K J; Hill, J P ^[2]; Staub, U; Bodenthin, Y; Garcia-Fernandez, M ^[3]; Scagnoli, V ^[4]; Kiryukhin, V; Cheong, S-W; Kim, B G ^[5]

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1. Institut Neel, CNRS and Universite Joseph Fourier, BP 166, F-38042 Grenoble Cedex 9 (France)
2. Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)
3. Swiss Light Source, Paul Sherrer Institut, 5232 Villigen (Switzerland)
4. European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex 9 (France)
5. Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854 (United States)

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 Bi{sub 0.31}Ca{sub 0.69}MnO{sub 3}, 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 La{sub 7/8}Sr{sub 1/8}MnO{sub 3}, 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.

• OSTI ID: 21024478
• Journal Information: Physical Review Letters, Vol. 99, Issue 20; Other Information: DOI: 10.1103/PhysRevLett.99.206403; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
DOPED MATERIALS
HOLES
LANTHANUM COMPOUNDS
MANGANATES
MANGANESE OXIDES
OXYGEN
STRONTIUM COMPOUNDS
X-RAY DIFFRACTION