2024, Spin Chain Orientation and Magneto-Optical Coupling in Twisted NiPS3 Homostructures, Applied Physics Letters(Editor's Pick, Cover image).

2024, Spin Chain Orientation and Magneto-Optical Coupling in Twisted NiPS₃ Homostructures, Applied Physics Letters

Abstract:

Magnetic two-dimensional (2D) materials have garnered significant attention due to their unique electronic, magnetic, and optical properties, and their potential applications in next-generation electronic and optoelectronic devices. However, the magneto-optical effects of oligolayer antiferromagnetic materials remain inadequately understood. Here, we investigate the magnetic properties of few-layer NiPS₃ and its twisted heterostructures, emphasizing the observation of novel optical phenomena at low temperatures (1.65 K). By stacking few-layer NiPS₃ to fabricate twisted homostructures, we probe their magnetic characteristics using photoluminescence (PL) spectroscopy. Our results reveal that sharp exciton peaks emerge at low temperatures and that the spin chain orientation in oligolayer NiPS₃ can be discerned through the polarization dependence of exciton PL intensity. Notably, fewer-layered NiPS₃ exhibits a significant magneto-optical effect under an applied magnetic field, allowing modulation of the polarization angle of its exciton PL spectrum. Additionally, the polarization-dependent Raman spectrum of NiPS₃ shows substantial changes under the influence of a magnetic field. These findings underscore the potential of few-layer NiPS₃ for future magneto-optical device applications.

Keywords: Spin Chain, Magneto-Optical Coupling, Twisted NiPS₃ Homostructures, Oligolayer NiPS₃, Polarization-dependent Raman spectrum.

Link: https://pubs.aip.org/aip/apl/article-abstract/125/11/113102/3311822/Spin-chain-orientation-and-magneto-optical?redirectedFrom=fulltext

Spin chain orientation and magneto-optical coupling in twisted NiPS3 homostructures.pdf