Screening and retardation effects on<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>180</mml:mn><mml:mo>°</mml:mo></mml:mrow></mml:math>-domain wall motion in ferroelectrics: Wall velocity and nonlinear dynamics due to polarization-screening charge interactions

Eliseev, Eugene A.; Morozovska, Anna N.; Svechnikov, George S.; Rumyantsev, E. L.; Shishkin, E. I.; Shur, V. Ya.; Kalinin, Sergei V.

doi:10.1103/physrevb.78.245409

Cited by 47 publications

(36 citation statements)

References 38 publications

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“…25,28,46,51 Polarization dependent dielectric surface layers 50,52 can inhibit external screening, thus changing conditions for domain evolution. 49,51,53 However, the results suggest only a minor influence of such "dead" layers as (i) domain patterns clearly depend on external conditions such as humidity and (ii) external screening is minimized in dry conditions for which the polarization dependence was observed. Downwards band bending at a newly nucleated positive domain upon application of high negative voltages facilitates electron injection from the top electrode, which allows for screening and larger domain sizes.…”

Section: Domain Size Dependence Of Initial Polarizationmentioning

confidence: 90%

Thickness, humidity, and polarization dependent ferroelectric switching and conductivity in Mg doped lithium niobate

Neumayer

Strelcov

Manzo

et al. 2015

Journal of Applied Physics

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Mg doped lithium niobate (Mg:LN) exhibits several advantages over undoped LN such as resistance to photorefraction, lower coercive fields, and p-type conductivity that is particularly pronounced at domain walls and opens up a range of applications, e.g., in domain wall electronics. Engineering of precise domain patterns necessitates well founded knowledge of switching kinetics, which can differ significantly from that of undoped LN. In this work, the role of humidity and sample composition in polarization reversal has been investigated under application of the same voltage waveform. Control over domain sizes has been achieved by varying the sample thickness and initial polarization as well as atmospheric conditions. In addition, local introduction of proton exchanged phases allows for inhibition of domain nucleation or destabilization, which can be utilized to modify domain patterns. Polarization dependent current flow, attributed to charged domain walls and band bending, demonstrates the rectifying ability of Mg:LN in combination with suitable metal electrodes that allow for further tailoring of conductivity. V C 2015 AIP Publishing LLC.

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Section: Domain Size Dependence Of Initial Polarizationmentioning

confidence: 90%

Thickness, humidity, and polarization dependent ferroelectric switching and conductivity in Mg doped lithium niobate

Neumayer

Strelcov

Manzo

et al. 2015

Journal of Applied Physics

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“…4 Surface charge screening determines the stabilization of the ferroelectric domains 5 as well as the motion of wall domains. 6 Electrostatic Atomic Force Microscopy (AFM) techniques such as Kelvin Probe Force Microscopy (KPFM) have been used to study ferroelectric domains and surface screening on BaTiO 3 (100) surfaces. [7][8][9] In this case, the surface potential at room temperature exhibits variations due to the differences in charge density between different polarized domains.…”

Section: Introductionmentioning

confidence: 99%

Surface screening of written ferroelectric domains in ambient conditions

Segura

Domingo

Fraxedas

et al. 2013

Journal of Applied Physics

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We have combined Piezoresponse Force Microscopy and Kelvin Probe Force Microscopy (KPFM) to study screening charge dynamics in written domains on PbZr0.2Ti0.8O3 (PZT) thin film surfaces under a controlled environment and at variable temperature. The screening dynamics decayed exponentially on a timescale of tens of minutes, consistently with what we expected for water-mediated surface diffusion of ionic species. Variable-temperature KPFM measurements showed variations in surface potential due to temporary unbalanced surface screening charges. Low humidity experiments revealed gradual incorporation of positive charges onto the surface, even in a non-reactive environment (N2), as well as deceleration of the screening dynamics upon reversal of the temperature variation. Our work may serve as a guide for future studies on the dynamics and nature of adsorbates on polarized PZT thin films.

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“…Analytical solutions of Ginzburg-Landau mean-field type calculations provide invaluable information about the thermodynamics and kinetics of defect-free domain switching [15,16,17,18], and models of domain walls [3] and their interactions with single defects [19], or with particularly regular, periodically ordered pinning potentials [20], but do not readily describe the inherent randomness. First-principles atomistic simulations, meanwhile, give extremely accurate estimates of domain wall energies and interactions with individual defects [4,21,22,23] • domain wall separating a P U P and P DOW N polarised region in a thin film of Pb(Zr,Ti)O 3 , adapted from [5].…”

Section: Introductionmentioning

confidence: 99%