Electron-beam driven relaxation oscillations in ferroelectric nanodisks

N. Ng; R. Ahluwalia; A. Kumar; D.J. Srolovitz; P. Chandra; James Floyd Scott

doi:10.1063/1.4932653

Electron-beam driven relaxation oscillations in ferroelectric nanodisks

N. Ng, R. Ahluwalia, A. Kumar, D.J. Srolovitz, P. Chandra, James Floyd Scott

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Abstract

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.

Original language	English
Article number	152902
Journal	Applied Physics Letters
Volume	107
Issue number	15
DOIs	https://doi.org/10.1063/1.4932653
Publication status	Published - 12 Oct 2015

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© 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
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title = "Electron-beam driven relaxation oscillations in ferroelectric nanodisks",

abstract = "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.",

author = "N. Ng and R. Ahluwalia and A. Kumar and D.J. Srolovitz and P. Chandra and Scott, {James Floyd}",

note = "This work was supported by National Science Foundation Grant No. NSF-DMR-1334428 (P. Chandra). ",

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AU - Ng, N.

AU - Ahluwalia, R.

AU - Kumar, A.

AU - Srolovitz, D.J.

AU - Chandra, P.

AU - Scott, James Floyd

N1 - This work was supported by National Science Foundation Grant No. NSF-DMR-1334428 (P. Chandra).

PY - 2015/10/12

Y1 - 2015/10/12

N2 - 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.

AB - 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.

U2 - 10.1063/1.4932653

DO - 10.1063/1.4932653

M3 - Article

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JO - Applied Physics Letters

JF - Applied Physics Letters

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Electron-beam driven relaxation oscillations in ferroelectric nanodisks

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