Strain control of superlattice implies weak charge-lattice coupling in La${}_{0.5}$Ca${}_{0.5}$MnO${}_3$

Abstract

We have recently argued that manganites do not possess stripes of charge order, implying that the electron-lattice coupling is weak [Phys Rev Lett \textbf{94} (2005) 097202]. Here we independently argue the same conclusion based on transmission electron microscopy measurements of a nanopatterned epitaxial film of La${}_{0.5}$Ca${}_{0.5}$MnO${}_3$. In strain relaxed regions, the superlattice period is modified by 2-3% with respect to the parent lattice, suggesting that the two are not strongly tied.

4 pages, 4 figures It is now explained why the work provides evidence to support weak-coupling, and rule out charge order

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
• The self-organised phases of manganites
• Oxygen-stripes in La0.5Ca0.5MnO3 from ab initio calculations
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Cited by in corpus (10)

• Sliding charge density wave in manganites
• On the electronic structure of the charge-ordered phase in epitaxial and polycrystalline La1-xCaxMnO3 (x = 0.55, 0.67) perovskite manganites
• Chromium at High Pressures: Weak Coupling and Strong Fluctuations in an Itinerant Antiferromagnet
• Very weak electron-phonon coupling and strong strain coupling in manganites
• Boson peak in overdoped manganites La_{1-x}Ca_{x}MnO_{3}
• Origin of Low-Energy Excitations in Charge-Ordered Manganites
• High resolution determination of ferromagnetic metallic limit in epitaxial La1-xCaxMnO3 films on NdGaO3
• Limited local electron-lattice coupling in manganites
• Absence of charge-density-wave sliding in epitaxial charge-ordered Pr0.48Ca0.52MnO3 films
• Orbital ordering in undoped manganites via a generalized Peierls instability