Coherent X-ray Scattering from Manganite Charge and Orbital Domains

Abstract

We report coherent x-ray scattering studies of charge and orbital domains in manganite systems. The experiments were carried out on LaMnO_3 and Pr_{0.6}Ca_{0.4}MnO_3, with the incident photon energy tuned near the Mn K edge. At room temperature, the orbital speckle pattern of LaMnO_3 was observed to be constant over a timescale of at least minutes, which is indicative of static orbital domains on this timescale. For Pr_{0.6}Ca_{0.4}MnO_3, both charge and orbital speckle patterns were observed. The observation of the latter rules out the presence of fast orbital fluctuations, while long time series data-- on the order of several minutes-- were suggestive of slow dynamic behavior. In contrast, the charge order speckle patterns were static.

6 pages, 4 figures

References in corpus (5)

• Glass Transition in the Polaron Dynamics of CMR Manganites
• Orbital Correlations in Doped Manganites
• A Resonant X-ray Scattering Study of Octahedral Tilt Ordering in LaMnO${}_3$ and Pr${}_{1-x}$Ca${}_x$MnO${}_3$
• Mesoscopic, Non-equilibrium Fluctuations of Inhomogeneous Electronic States in Manganites
• Essential Role of the Cooperative Lattice Distortion in the Charge, Orbital and Spin Ordering in doped Manganites

Cited by in corpus (7)

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• Dielectric anomaly at the orbital order-disorder transition in LaMnO_(3+delta)
• Instabilities and Insulator-Metal transitions in Half-Doped Manganites induced by Magnetic-Field and Doping
• Orbital order-disorder transition in La(1-x)Nd(x)MnO(3) (x = 0.0-1.0) and La(1-x-y)Nd(yx)Sr(y)MnO(3) (x = 0.1; y = 0.05,0.1)
• Current-driven orbital order-disorder transition in LaMnO3
• Orbital Domain Dynamics in a Doped Manganite
• Ultrafast collective dynamics of short-range charge/orbital ordering fluctuations in colossal magnetoresistive oxides