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Compositionally Tunable Magneto-optical Properties of Lead-Free Halide Perovskite Nanocrystals.
J Phys Chem Lett
December 2024
Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada.
Inorganic lead-free metal halide perovskites have garnered much attention as low-toxicity alternatives to lead halide perovskites for luminescence and photovoltaic applications. However, the electronic structure and properties of these materials, including the composition dependence of the band structure, spin-orbit coupling, and Zeeman effects, remain poorly understood. Here, we investigated vacancy-ordered CsBiX (X= Cl, Br) perovskite nanocrystals using magnetic circular dichroism spectroscopy.
View Article and Find Full Text PDFElectrical polarization switching of perovskite polariton laser.
Nanophotonics
June 2024
Faculty of Physics, Institute of Experimental Physics, University of Warsaw, ul. Pasteura 5, PL-02-093 Warsaw, Poland.
Optoelectronic and spinoptronic technologies benefit from flexible and tunable coherent light sources combining the best properties of nano- and material-engineering to achieve favorable properties such as chiral lasing and low threshold nonlinearities. In this work we demonstrate an electrically wavelength- and polarization-tunable room temperature polariton laser due to emerging photonic spin-orbit coupling. For this purpose, we design an optical cavity filled with both birefringent nematic liquid crystal and an inorganic perovskite.
View Article and Find Full Text PDFAnisotropic exchange interaction of two hole-spin qubits.
Nat Phys
May 2024
Department of Physics, University of Basel, Basel, Switzerland.
Semiconductor spin qubits offer the potential to employ industrial transistor technology to produce large-scale quantum computers. Silicon hole spin qubits benefit from fast all-electrical qubit control and sweet spots to counteract charge and nuclear spin noise. However, the demonstration of a two-qubit interaction has remained an open challenge.
View Article and Find Full Text PDFRotational photonic spin Hall effect.
Nanophotonics
November 2023
Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Synergetic Innovation Center for Quantum Effects and Applications, School of Physics and Electronics, Hunan Normal University, Changsha 410081, China.
Multidimensional manipulation of photonic spin Hall effect (PSHE) has attracted considerable interest due to its potential in a wide variety of spin-based applications. Plenty of research efforts have been devoted to transverse or longitudinal spin-dependent splitting; however, the splitting pattern that can self-rotate in a three-dimensional (3-D) space appears to be missing in literature. In this paper, we introduce a novel 3-D rotational PSHE, which can be realized and tuned using well-designed Pancharatnam-Berry phase metasurfaces.
View Article and Find Full Text PDFTunable Mirror-Symmetric Type-III Ising Superconductivity in Atomically-Thin Natural Van der Waals Heterostructures.
Adv Mater
December 2024
School of Physics, and State Key Laboratory of Silicon Materials and Advanced Semiconductor Materials, Zhejiang University, Hangzhou, 310027, China.
Article Synopsis
- Van der Waals (vdW) crystals with strong spin-orbit coupling are key for discovering unique 2D superconductors, where new pairing states arise from the combination of various factors like SOC and crystal structure.
- The study highlights a mirror-symmetry protected Ising pairing state in a heterostructure of SnSe and TaSe, where the arrangement of the lattice helps minimize interference from certain pairing mechanisms.
- The findings indicate that these vdW heterostructures can enhance the critical temperature under specific magnetic fields, which does not occur in other multilayer configurations due to a loss of mirror symmetry.
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