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The Structure of Nanoscale Polaron Correlations in La1.2Sr1.8Mn2O7

B. J. Campbell·R. Osborn·D. N. Argyriou·L. Vasiliu-Doloc·J. F. Mitchell·S. K. Sinha·U. Ruett·C. D. Ling·Z. Islam·J. W. Lynn
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Abstract

A system of strongly-interacting electron-lattice polarons can exhibit charge and orbital order at sufficiently high polaron concentrations. In this study, the structure of short-range polaron correlations in the layered colossal magnetoresistive perovskite manganite, La1.2Sr1.8Mn2O7, has been determined by a crystallographic analysis of broad satellite maxima observed in diffuse X-ray and neutron scattering data. The resulting q=(0.3,0,1) modulation is a longitudinal octahedral-stretch mode, consistent with an incommensurate Jahn-Teller-coupled charge-density-wave fluctuations, that implies an unusual orbital-stripe pattern parallel to the <100> directions.

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B. J. Campbell, R. Osborn, D. N. Argyriou, L. Vasiliu-Doloc, J. F. Mitchell, S. K. Sinha, U. Ruett, C. D. Ling, Z. Islam, J. W. Lynn. 2001-07-09. The Structure of Nanoscale Polaron Correlations in La1.2Sr1.8Mn2O7. https://doi.org/10.1103/physrevb.65.014427

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