Limited local electron-lattice coupling in manganites: An electron diffraction study

作者：Sanchez D^*; Calderon M J; Sanchez Benitez J; Williams A J; Attfield J P; Midgley P A; Mathur N D

来源：Physical Review B, 2008, 77(9): 092411.

DOI：10.1103/PhysRevB.77.092411

(Pr, Ca)MnO(3) is the archetypal charge-ordered manganite, but in Pr(0.48)Ca(0.52)MnO(3), 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.

• 出版日期2008-3