Phys. Rev. B 77, 092411 (2008) [4 pages]Limited local electron-lattice coupling in manganites: An electron diffraction studyReceived 15 January 2008; published 27 March 2008 (Pr,Ca)MnO3 is the archetypal charge-ordered manganite, but in Pr0.48Ca0.52MnO3, we find (using convergent-beam electron diffraction and dark-field images) that the superlattice period is locally incommensurate with respect to the parent lattice and that the superlattice orientation possesses significant local variations. This suggests that local electron-lattice coupling never overwhelmingly dominates the rich physics of manganites, even in the most extreme scenarios that produce the largest colossal magnetoresistance effects. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.77.092411
DOI:
10.1103/PhysRevB.77.092411
PACS:
75.47.Lx, 71.38.−k, 71.45.Lr
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