Weak Charge-Lattice Coupling Requires Reinterpretation of Stripes of Charge Order in La1-xCaxMnO3

J. Loudon, S. Cox, A. Williams, J. Attfield, P. Littlewood, P. Midgley, N. Mathur

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Modulations in manganites attributed to stripes of charge/orbital/spin order are thought to result from strong electron-lattice interactions that lock the superlattice and parent lattice periodicities. Surprisingly in La1-xCaxMnO3 (x>0.5,90  K), convergent beam (3.6 nm spot) electron diffraction patterns rule out charge stacking faults and indicate a superlattice with uniform periodicity. Moreover, large area electron diffraction peaks are sharper than simulations with stacking faults. Since the electron-lattice coupling does not lock the two periodicities (to yield stripes) it may be too weak to strongly localize charge.

Original languageEnglish
Article number097202
Number of pages4
JournalPhysical Review Letters
Volume94
Issue number9
Early online date11 Mar 2005
DOIs
Publication statusPublished - 2005

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