Spontaneous polarization and pyroelectric coefficient of lithium niobate and lithium tantalate determined from crystal structure data

Weigel, Tina; Ludt, Christian; Leisegang, Tilmann; Mehner, Erik; Jachalke, Sven; Stöcker, Hartmut; Doert, Thomas; Meyer, Dirk C.; Zschornak, Matthias

doi:10.1103/physrevb.108.054105

Cited by 6 publications

(1 citation statement)

References 107 publications

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“…[10,11] Additionally, LiNbO 3 , as a multifunctional ferroelectric material, exhibits a strong spontaneous polarization effect. [12][13][14] This results in the generation and asymmetric distribution of surface charges, leading to the formation of "built-in electric field" when exposed to light. [15,16] In recent years, researchers have made significant advancements in understanding the unique ferroelectric properties of LiNbO 3 .…”

Section: Introductionmentioning

confidence: 99%

Broadband, Plasmon‐Modified SnSe₂ Photodetector Based on LNOI Thin‐Film Platform

Liu,

Sun,

et al. 2024

Adv Materials Inter

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Lithium niobate on insulator (LNOI) is widely recognized as an essential optoelectronic integration platform due to its unique ferroelectric properties and photorefractive effect. However, the wide bandgap and weak absorption of lithium niobate limit its further application in integrated photodetection field. To address this issue, encapsulating silver nanoparticles within the LNOI structure are proposed to manipulate the light field distribution of modified lithium niobate through the localized surface plasmon resonance (LSPR) effect and utilize the modified lithium niobate thin film as a functional substrate to tailor the optoelectronic properties of surface SnSe2 nanosheets, significantly enhancing their photodetection capabilities. The photocurrent of the SnSe2 photodetector based on LNOI with embedded Ag nanoparticles is enhanced by up to 1912 times compared to that on the original LNOI under the same conditions, which represents the highest reported plasmonic‐induced photodetection enhancement. This work deepens the basic research on plasmonic‐modified 2D materials and ferroelectric materials, which promotes the development of on‐chip photodetectors and the realization of fully functional photonic circuits that integrate all essential components on a single chip.

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Section: Introductionmentioning

confidence: 99%

Broadband, Plasmon‐Modified SnSe₂ Photodetector Based on LNOI Thin‐Film Platform

Liu,

Sun,

et al. 2024

Adv Materials Inter

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Pyroelectricity in Ferroelectric PbTiO₃ Enhanced by A-Site Cation Contribution and Negative Thermal Expansion

Eklund,

Karttunen

2024

J. Phys. Chem. C

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The primary and secondary pyroelectric effect in ferroelectric tetragonal PbTiO 3 perovskite oxide has been studied with quantum chemical methods. Hybrid PBEsol0 density functional method accurately reproduces the experimental crystal structure of PbTiO 3 and enables systematic studies on the pyroelectricity, lattice thermal conductivity, and other physical properties of PbTiO 3 . Phonon anharmonicity and finite-temperature phonon properties necessary for the study of primary pyroelectricity are determined with the use of Self-Consistent Phonon Theory. Secondary pyroelectricity and the negative thermal expansion of PbTiO 3 are investigated with quasi-harmonic approximation. In comparison to another tetragonal ferroelectric perovskite oxide BaTiO 3 , the primary pyroelectric coefficient of PbTiO 3 is increased by the contributions of the polarized Pb(II) A-site cations, and the secondary pyroelectric coefficient is increased by the negative thermal expansion.

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Far-Reaching Remote Doping for Monolayer MoS₂ Using a Ferroelectric Substrate: Unveiling the Impact of h-BN Spacer Thickness

Rong,

Noro,

Nishigaki

et al. 2024

ACS Appl. Electron. Mater.

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The damage-free doping of single-layer transition-metal dichalcogenides (TMDs) is crucial in the development of lateral two-dimensional (2D) electronics and optoelectronics. This can be achieved by remote carrier doping through an insulating barrier. This paper proposes a remote carrier density modulation method for TMDs using a ferroelectric substrate and thick hexagonal boron nitride (h-BN) spacer layers between 2 and 60 nm. Photoluminescence measurements of monolayer molybdenum disulfide on a periodically poled magnesium oxide-doped lithium niobate substrate showed that ferroelectric doping can be achieved even with h-BN spacer layers. Dissimilar to other remote doping, our research demonstrates a significant advance in remote doping capable of extending over 10 nm from the ferroelectric substrate. To explain our results, we employ three-dimensional Thomas–Fermi theory models, which suggest that the h-BN-thickness-dependent doping effect can be attributed to the dielectric screening property of h-BN. This enables the remoted doping to keep a flat interface of h-BN/TMDs, which could provide a promising route toward damage-free remote doping for TMDs, thereby enhancing the performance of nanoscale 2D TMD-based electronic and optoelectronic devices.

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Spontaneous polarization and pyroelectric coefficient of lithium niobate and lithium tantalate determined from crystal structure data

Cited by 6 publications

References 107 publications

Broadband, Plasmon‐Modified SnSe₂ Photodetector Based on LNOI Thin‐Film Platform

Broadband, Plasmon‐Modified SnSe₂ Photodetector Based on LNOI Thin‐Film Platform

Pyroelectricity in Ferroelectric PbTiO₃ Enhanced by A-Site Cation Contribution and Negative Thermal Expansion

Far-Reaching Remote Doping for Monolayer MoS₂ Using a Ferroelectric Substrate: Unveiling the Impact of h-BN Spacer Thickness

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Spontaneous polarization and pyroelectric coefficient of lithium niobate and lithium tantalate determined from crystal structure data

Cited by 6 publications

References 107 publications

Broadband, Plasmon‐Modified SnSe2 Photodetector Based on LNOI Thin‐Film Platform

Broadband, Plasmon‐Modified SnSe2 Photodetector Based on LNOI Thin‐Film Platform

Pyroelectricity in Ferroelectric PbTiO3 Enhanced by A-Site Cation Contribution and Negative Thermal Expansion

Far-Reaching Remote Doping for Monolayer MoS2 Using a Ferroelectric Substrate: Unveiling the Impact of h-BN Spacer Thickness

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Product

Resources

About

Broadband, Plasmon‐Modified SnSe₂ Photodetector Based on LNOI Thin‐Film Platform

Broadband, Plasmon‐Modified SnSe₂ Photodetector Based on LNOI Thin‐Film Platform

Pyroelectricity in Ferroelectric PbTiO₃ Enhanced by A-Site Cation Contribution and Negative Thermal Expansion

Far-Reaching Remote Doping for Monolayer MoS₂ Using a Ferroelectric Substrate: Unveiling the Impact of h-BN Spacer Thickness