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Electron-Beam Driven Relaxation Oscillations in Ferroelectric Nanodisks

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arxiv 1505.02327 v1 pith:QQ3X36O5 submitted 2015-05-09 cond-mat.mtrl-sci

Electron-Beam Driven Relaxation Oscillations in Ferroelectric Nanodisks

Nathaniel Ng , Rajeev Ahluwalia , Ashok Kumar , David J. Srolovitz , Premala Chandra , James F. Scott This is my paper
classification cond-mat.mtrl-sci
keywords nanodomaindrivendynamicsnanodisksoscillationsrelaxationathermalatomic-scale
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Using a combination of computational simulations, atomic-scale resolution imaging and phenomenological modelling, we examine the underlying mechanism for nanodomain restructuring in lead zirconate titanate (PZT) nanodisks driven by electron beams. The observed subhertz nanodomain dynamics are identified with relaxation oscillations where the charging/discharging cycle time is determined by saturation of charge traps and nanodomain wall creep. These results are unusual in that they indicate very slow athermal dynamics in nanoscale systems.

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