Orbital Polaron Lattice Formation in Lightly Doped La{sub 1-x}Sr{sub x}MnO{sub 3}
Journal Article
·
· Physical Review Letters
- Leibniz Institute for Solid State and Materials Research IFW Dresden, Helmholtzstr. 20, 01069 Dresden (Germany)
- Max-Planck-Institut fuer Metallforschung, Heisenberg Str. 3, 70569 Stuttgart (Germany)
- Laboratoire de Physico-Chimie de l'Etat Solide, Universite de Paris-Sud, 91405 Orsay Cedex (France)
By resonant x-ray scattering at the Mn K edge on La{sub 7/8}Sr{sub 1/8}MnO{sub 3}, we show that an orbital polaron lattice (OPL) develops at the metal-insulator transition of this compound. This orbital reordering explains consistently the unexpected coexistence of ferromagnetic and insulating properties at low temperatures, the quadrupling of the lattice structure parallel to the MnO{sub 2} planes, and the observed polarization and azimuthal dependencies. The OPL is a clear manifestation of strong orbital-hole interactions, which play a crucial role for the colossal magnetoresistance effect and the doped manganites in general.
- OSTI ID:
- 20699660
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 23 Vol. 95; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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