Electron-beam driven relaxation oscillations in ferroelectric nanodisks
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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 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.
Ng , N , Ahluwalia , R , Kumar , A , Srolovitz , D J , Chandra , P & Scott , J F 2015 , ' Electron-beam driven relaxation oscillations in ferroelectric nanodisks ' Applied Physics Letters , vol 107 , no. 15 , 152902 . DOI: 10.1063/1.4932653
Applied Physics Letters
© 2015 AIP Publishing LLC. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at: http://dx.doi.org/10.1063/1.4932653
DescriptionThis work was supported by National Science Foundation Grant No. NSF-DMR-1334428 (P. Chandra).
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