Coherent x-ray scattering from manganite charge and orbital domains

Article

关键词: PHOTON-CORRELATION SPECTROSCOPY;    FLUCTUATIONS;    DYNAMICS;    STATES;   

DOI  :  10.1103/PhysRevB.66.134412

来源: SCIE

【 摘 要 】

We report coherent x-ray scattering studies of charge and orbital domains in manganite systems. The experiments were carried out on LaMnO3 and Pr0.6Ca0.4MnO3, with the incident photon energy tuned near the Mn K edge. At room temperature, the orbital speckle pattern of LaMnO3 was observed to be constant over a timescale of at least minutes, which is indicative of static orbital domains on this timescale. For Pr0.6Ca0.4MnO3, 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.

【 授权许可】

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