Recrystallization-Driven High-Performance Optical Nonlinearity Recovery of Layered van der Waals NbOCl2 DOI
Jianlong Kang, Li Zhou, Yiduo Wang

et al.

The Journal of Physical Chemistry Letters, Journal Year: 2025, Volume and Issue: unknown, P. 4262 - 4269

Published: April 22, 2025

van der Waals crystal NbOCl2 has attracted considerable interest owing to its spontaneous parametric downconversion properties, but challenges remain due degradation and reduced optical nonlinearity under ambient conditions. Here, we show that high-temperature vacuum annealing can recover even enhance second harmonic generation (SHG) in degraded via recrystallization. During degradation, the second-order decreases, accompanied by changes structure of NbOCl2. However, after annealing, SHG is recovered improved as a result recrystallization nanosheets. This strategy enables realization tunable nonlinear responses, including absorption. By combining linear absorption spectroscopy, transient absorption, transmission electron microscopy, occurs specific temperatures, leading bandgap modulation altered electronic relaxation. study offers new approach achieving reversible for device applications.

Language: Английский

Sliding ferroelectric controllable topological phases in the Bi2Te3/MnBi2Te4 DOI
Yan Liang, Pei Zhao, Fulu Zheng

et al.

Physical review. B./Physical review. B, Journal Year: 2025, Volume and Issue: 111(3)

Published: Jan. 24, 2025

Citations

0
Topological Phase Transitions, Phase Diagrams, and Dielectric Properties of Pb(Zr0.7Ti0.3)O3‐Based Superlattices DOI Creative Commons
Zhenhua Chen, Yu Huang,

Yongjun Wu

et al.

Advanced Physics Research, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Abstract Ferroelectric/paraelectric superlattices, created through the periodic stacking of their constituent materials, exhibit intricate phase diagrams that reveal a variety polar topologies and properties not found in any individual components. In this study, phase‐field simulations are utilized to systematically calculate Zr‐rich Pb(Zr, Ti)O 3 /SrTiO superlattices with varying periodicity, strain, temperature. A rhombohedral‐type labyrinth domain is observed, which oriented along [110] direction under relatively low compressive strain. Meanwhile, higher strains lead formation skyrmions shorter periodicities. Notably, high dielectric permittivity 1700 at room temperature for skyrmion periodicity 6 when grown on DyScO substrate, double value PbTiO superlattice. Moreover, transition from skyrmion, vortex/labyrinth states cubic elevated temperatures discovered, accompanied by significant reduction responses. It hoped work will inspire further exploration into design intriguing superior properties.

Language: Английский

Citations

0
Ferrovalley Physics in Stacked Bilayer Altermagnetic Systems DOI
Yunqin Li, Yuke Zhang, Xinyu Lu

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

As an emerging magnetic phase, altermagnets with compensated order and nonrelativistic spin-splitting have attracted widespread attention. Currently, strain engineering is considered to be effective method for inducing valley polarization in altermagnets; however, achieving controllable switching of extremely challenging. Herein, combined the tight-binding model first-principles calculations, we propose that interlayer sliding can used successfully induce effectively manipulate large altermagnets. Using Fe2MX4 (M = Mo, W; X S, Se, or Te) family as examples, predict sliding-induced ferrovalley states such systems exhibit many unique properties, including linearly optical dichroism independent spin-orbit coupling anomalous Hall effect. These findings imply correlation among spin, valley, layer, degrees freedom makes attractive spintronics, valleytronics, even their crossing areas.

Language: Английский

Citations

0
DFT Investigations of Defect Engineering in GeS Monolayers: Impact on Electronic Structure, Stability, and Optical Properties DOI
Safdar Mehmood, Yang Xia,

Furong Qu

et al.

Journal of Materials Science Materials in Electronics, Journal Year: 2025, Volume and Issue: 36(11)

Published: April 1, 2025

Language: Английский

Citations

0
Intrinsic magnetoelectric coupling induced by the flat bands in kagome van der Waals multiferroic heterostructures DOI
Yan Lü, Haonan Wang,

Xilong Xu

et al.

Physical review. B./Physical review. B, Journal Year: 2025, Volume and Issue: 111(16)

Published: April 15, 2025

Language: Английский

Citations

0
High-throughput Theoretical Exploration of Multifunctional Planar MBenes: Magnetism, Topology, Superconductivity, and Anode Applications DOI Creative Commons
Xiaodong Lv, Ting Han, Rong Liu

et al.

Advanced Powder Materials, Journal Year: 2025, Volume and Issue: unknown, P. 100297 - 100297

Published: April 1, 2025

Language: Английский

Citations

0
Recrystallization-Driven High-Performance Optical Nonlinearity Recovery of Layered van der Waals NbOCl2 DOI
Jianlong Kang, Li Zhou, Yiduo Wang

et al.

The Journal of Physical Chemistry Letters, Journal Year: 2025, Volume and Issue: unknown, P. 4262 - 4269

Published: April 22, 2025

van der Waals crystal NbOCl2 has attracted considerable interest owing to its spontaneous parametric downconversion properties, but challenges remain due degradation and reduced optical nonlinearity under ambient conditions. Here, we show that high-temperature vacuum annealing can recover even enhance second harmonic generation (SHG) in degraded via recrystallization. During degradation, the second-order decreases, accompanied by changes structure of NbOCl2. However, after annealing, SHG is recovered improved as a result recrystallization nanosheets. This strategy enables realization tunable nonlinear responses, including absorption. By combining linear absorption spectroscopy, transient absorption, transmission electron microscopy, occurs specific temperatures, leading bandgap modulation altered electronic relaxation. study offers new approach achieving reversible for device applications.

Language: Английский

Citations

0