Increase and Relaxation of Abnormal Conduction Current in Lithium Niobate Crystals with Charged Domain Walls

Есин, А. А.; Ахматханов, А. Р.; Батурин, И. С.; Shur, V. Ya.

doi:10.1080/00150193.2015.998580

Cited by 3 publications

(1 citation statement)

References 34 publications

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“…1b). This leakage contribution was previously attributed to the conductivity through the CDWs that interconnected the polar surfaces [12,13]. Ex situ visualization of the domain structure on the Y section allowed us to measure the average CDW inclination angle as 0.7 ∘ (Fig.…”

Section: Resultsmentioning

confidence: 99%

Dielectric Permittivity Enhancement By Charged Domain Walls Formation In Stoichiometric Lithium Niobate

Есин¹,

Ахматханов²,

Shur³

2016

Kms

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We present an experimental study of contribution of charged domain walls into dielectric permittivity of lithium niobate. It has been shown that formation of dense structure with spike-like domains leads to order of magnitude increase of permittivity, which gradually decreases with time. The decrease rate accelerates under DC bias. Dielectric permittivity decreases linearly with a logarithm of frequency. The obtained results were explained considering vibration of the steps on the charged domain walls.

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Section: Resultsmentioning

confidence: 99%

Dielectric Permittivity Enhancement By Charged Domain Walls Formation In Stoichiometric Lithium Niobate

Есин¹,

Ахматханов²,

Shur³

2016

Kms

View full text Add to dashboard Cite

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Tilt control of the charged domain walls in lithium niobate

Есин

Ахматханов

Shur

2019

Applied Physics Letters

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Precise control of the domain structure in ferroelectric single crystals is one of the most important and challenging tasks in physics of ferroelectrics. So far, main part of investigations in this area was aimed at realization of high efficiency nonlinear optical interactions, such as second harmonic generation (SHG) and optical parametric oscillation. These applications require precise spatial variation of the spontaneous polarization, which distribution within the crystal is determined by the positions and orientations of the domain walls (DWs). Recently, the scientific attention has turned from the domains to the DWs themselves: these movable unit-cell-thick interfaces were proposed as the building blocks for reconfigurable nanoelectronics devices, because their properties can differ drastically from the bulk parent material [1, 2]. In particular, it has been shown that conductivity of the charged domain walls (CDWs) in ferroelectrics is many orders of magnitude higher, than that in the single domain state [3]. The utilization of the CDW as nanoelectronics devices requires three technological aspects to be developed: (1) controllable creation, (2) geometry tuning, and (3) removal. We present the experimental study of the CDW formation in congruent lithium niobate single crystals during polarization reversal using liquid and solid-state electrodes, as well as their combination [4]. It was shown that material of the electrode applied to the Z-polar surface is crucial. It was shown that CDW can be formed by two alternative procedures: (1) by forward switching for liquid electrode at Z+ polar surface and solid electrodeat Zone , (2) by backward switching for solid electrode at Z+ polar surface and liquid electrode at Zone. The obtained domain structure was investigated in the bulk of the crystal using scanning Cherenkov-type SHG microscopy [5]. For both used procedures the CDWs were formed when domains grew from Z+ polar surface covered by solid or liquid electrode towards Z-surface covered by solid electrode. Thus, existence of the solid electrode on Z-surface is the necessary condition for CDW formation. The created CDW can be transformed to almost neutral domain wall by application of the field pulse of the reverse polarity for both procedures. As a result, the tilt of the formed CDW can be tuned reversibly in the range from 0.2 to 1.2 degrees resulting in change between almost isolated and highly conductive states. When the tilt exceeded 1.2 degrees the CDW became jugged due to formation of additional spikes. For the second procedure the unusual partial backward switching during forward polarization reversal was revealed. Moreover, we have demonstrated that the created CDW can be used as a nanoelectronics channel for local electrolysis opening the additional possibilities for the ferroelectric lithography. The equipment of the Ural Center for Shared Use "Modern nanotechnology" Ural Federal University was used. The research was made possible in part by RFBR (grant 18-32-00641_mol_a).

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The electronic conductivity in single crystals of lithium niobate and lithium tantalate family

2016

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Increase and Relaxation of Abnormal Conduction Current in Lithium Niobate Crystals with Charged Domain Walls

Cited by 3 publications

References 34 publications

Dielectric Permittivity Enhancement By Charged Domain Walls Formation In Stoichiometric Lithium Niobate

Dielectric Permittivity Enhancement By Charged Domain Walls Formation In Stoichiometric Lithium Niobate

Tilt control of the charged domain walls in lithium niobate

The electronic conductivity in single crystals of lithium niobate and lithium tantalate family

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