Limited local electron-lattice coupling in manganites

Abstract

(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.

9 pages, 4 figures; accepted in Physical Review B

References in corpus (7)

• Coexisting charge modulation and ferromagnetism produces long period phases in manganites: new example of electronic soft matter
• Weak charge-lattice coupling requires reinterpretation of stripes of charge order in La1-xCaxMnO3
• Phase diagram of the La${}_{1-x}$Ca${}_x$MnO${}_3$ compound for $0.5\le x\le 0.9$
• Continuous Charge Modulated Diagonal Phase in Manganites
• The transport, ultrasound, and structural properties for the charge ordered Pr1-xCaxMnO3 (0.5<=x<=0.875) manganites
• Strain control of superlattice implies weak charge-lattice coupling in La${}_{0.5}$Ca${}_{0.5}$MnO${}_3$
• Pressure Induced Reentrant Electronic and Magnetic State in Pr0.7Ca0.3MnO3 Manganite

Cited by in corpus (1)

• Absence of charge-density-wave sliding in epitaxial charge-ordered Pr0.48Ca0.52MnO3 films