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

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...

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Veröffentlicht in:Applied physics letters 2024-09, Vol.125 (11)
Hauptverfasser: Chen, Junying, Xie, Xing, Oyang, Xinyu, Ding, Junnan, Ouyang, Fangping, Liu, Zongwen, Wang, Jian-Tao, He, Jun, Liu, Yanping
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container_issue 11
container_start_page
container_title Applied physics letters
container_volume 125
creator Chen, Junying
Xie, Xing
Oyang, Xinyu
Ding, Junnan
Ouyang, Fangping
Liu, Zongwen
Wang, Jian-Tao
He, Jun
Liu, Yanping
description 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 nickel phosphorus trisulfide (NiPS3) and its twisted heterostructures, emphasizing the observation of 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 the 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.
doi_str_mv 10.1063/5.0223945
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subjects Antiferromagnetism
Electron spin
Excitation spectra
Excitons
Heterostructures
Low temperature
Magnetic fields
Magnetic properties
Optical coupling
Optical properties
Optoelectronic devices
Photoluminescence
Polarization (spin alignment)
Spectrum analysis
Two dimensional materials
title Spin chain orientation and magneto-optical coupling in twisted NiPS3 homostructures
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