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The quantum anomalous Hall effect in two-dimensional hexagonal monolayers studied by first-principles calculations.
iScience
January 2025
School of Physics and Electronics, Shandong Normal University, Jinan 250358, China.
The quantum anomalous Hall effect (QAHE) demonstrates the potential for achieving quantized Hall resistance without the need for an external magnetic field, making it highly promising for reducing energy loss in electronic devices. Its realization and research rely heavily on precise first-principles calculations, which are essential for analyzing the electronic structures and topological properties of novel two-dimensional (2D) materials. This review article explores the theoretical progress of QAHE in 2D hexagonal monolayers with strong spin-orbit coupling and internal magnetic ordering.
View Article and Find Full Text PDFEnhancing valley splitting and anomalous valley Hall effect in the V-doped Janus MoSeTe monolayer.
Phys Chem Chem Phys
January 2025
School of Physics and Electrical Engineering, Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Hubei Longzhong Laboratory, Hubei University of Arts and Science, Xiangyang, Hubei, 441053, China.
Exploring valleytronics in two-dimensional materials is of great significance for the development of advanced information devices. In this study, we investigate the valley polarization and electronic properties of V-doped 2H-phase Janus MoSeTe by using first-principles calculations. Our results reveal a remarkable valley spin splitting up to 60 meV, driven by the breaking of time-reversal symmetry due to the magnetic effect of V 3d orbitals.
View Article and Find Full Text PDFExtreme Optical Chirality from Plasmonic Nanocrystals on a Mirror.
Nano Lett
January 2025
NanoPhotonics Centre, Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge CB3 0HE, United Kingdom.
Metal nanocrystals synthesized in achiral environments usually exhibit no chiroptical effects. However, by placing nominally achiral nanocrystals 1.3 nm above gold films, we find giant chiroptical effects, reaching anisotropy factors as high as ≈ 0.
View Article and Find Full Text PDFTopochemical Synthesis and Electronic Structure of High-Crystallinity Infinite-Layer Nickelates on an Orthorhombic Substrate.
Nano Lett
January 2025
Department of Physics, Hong Kong Institute for Advanced Study, City University of Hong Kong, Kowloon, Hong Kong 999077, China.
Superconductivity in infinite-layer nickelates has stirred much research interest, to which questions regarding the nature of superconductivity remain elusive. A critical leap forward to address these intricate questions is through the growth of high-crystallinity infinite-layer nickelates, including the "parent" phase. Here, we report the synthesis of a high-quality thin-film nickelate, NdNiO.
View Article and Find Full Text PDFPolycrystalline Films of Indium-Doped PbTe on Amorphous Substrates: Investigation of the Material Based on Study of Its Structural, Transport, and Optical Properties.
Materials (Basel)
December 2024
School of Electrical and Computer Engineering, Ben Gurion University of the Negev, Beer Sheba 8410501, Israel.
Nowadays, polycrystalline lead telluride is one of the premier substances for thermoelectric devices while remaining a hopeful competitor to current semiconductor materials used in mid-infrared photonic applications. Notwithstanding that, the development of reliable and reproducible routes for the synthesis of PbTe thin films has not yet been accomplished. As an effort toward this aim, the present article reports progress in the growth of polycrystalline indium-doped PbTe films and their study.
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