Ng, Nathaniel and Ahluwalia, Rajeev and Kumar, Ashok and Srolovitz, David J. and Chandra, Premala and Scott, James F.
(2015)
Electron-beam driven relaxation oscillations in ferroelectric nanodisks.
Applied Physics Letters, 107 (15).
152902-1-152902-4.
ISSN 0003-6951
Abstract
Using a combination of computational simulations, atomic-scale resolution imaging and phenomenological modelling, we examine the underlying mechanism for nanodotnain restructuring in lead zirconate titanate 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, and possible applications of gated versions are discussed.
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