Mesoscopic, non-equilibrium fluctuations of inhomogeneous electronic states in manganites

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Abstract

By using the dark-field real-space imaging technique of transmission electron microscopy (TEM), we have observed slow 200 Å scale fluctuations of charge-ordered (CO) phase in mixed-valent manganites under a strong electron beam irradiation. In addition to these unusual fluctuations of the CO phase, we observed switching-type fluctuations of electrical resistivity in the same sample, which were found to be as large as several percents. Systematic analysis indicates that these two different types of fluctuations with a similar time scale of the order of seconds are interconnected through a metastable insulating charge-disordered state. Current dependence of the fluctuations suggests a non-equilibrium nature of this slow dynamics.

Original languageEnglish (US)
Pages (from-to)411-417
Number of pages7
JournalEurophysics Letters
Volume55
Issue number3
DOIs
StatePublished - Aug 1 2001

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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