Version 1
: Received: 18 July 2024 / Approved: 18 July 2024 / Online: 18 July 2024 (09:43:46 CEST)
How to cite:
Chan, C.-W.; Hsieh, C.-Y.; Chan, F.-M.; Huang, P.-J.; Yang, A. C.-Y. Valley‐Spin‐Polarization of MoS2 Monolayer Induced by Ferromagnetic Order in an Antiferromagnet. Preprints2024, 2024071480. https://doi.org/10.20944/preprints202407.1480.v1
Chan, C.-W.; Hsieh, C.-Y.; Chan, F.-M.; Huang, P.-J.; Yang, A. C.-Y. Valley‐Spin‐Polarization of MoS2 Monolayer Induced by Ferromagnetic Order in an Antiferromagnet. Preprints 2024, 2024071480. https://doi.org/10.20944/preprints202407.1480.v1
Chan, C.-W.; Hsieh, C.-Y.; Chan, F.-M.; Huang, P.-J.; Yang, A. C.-Y. Valley‐Spin‐Polarization of MoS2 Monolayer Induced by Ferromagnetic Order in an Antiferromagnet. Preprints2024, 2024071480. https://doi.org/10.20944/preprints202407.1480.v1
APA Style
Chan, C. W., Hsieh, C. Y., Chan, F. M., Huang, P. J., & Yang, A. C. Y. (2024). Valley‐Spin‐Polarization of MoS2 Monolayer Induced by Ferromagnetic Order in an Antiferromagnet. Preprints. https://doi.org/10.20944/preprints202407.1480.v1
Chicago/Turabian Style
Chan, C., Pin-Jia Huang and and Chao-Yao Yang. 2024 "Valley‐Spin‐Polarization of MoS2 Monolayer Induced by Ferromagnetic Order in an Antiferromagnet" Preprints. https://doi.org/10.20944/preprints202407.1480.v1
Abstract
Transition metal dichalcogenides (TMDs) monolayers exhibit unique valleytronics properties due to the dependency of the coupled valley and spin state at the hexagonal corner of the first Brillouin zone. Precisely controlling valley spin-polarization via manipulating the electron population enables its application in valley-based memory or quantum technologies. This study uncovered the uncompensated spins of the antiferromagnetic oxide (NiO) serving as the ferromagnetic (FM) order to induce valley spin-polarization in molybdenum disulfide (MoS₂) monolayers via the magnetic proximity effect (MPE). A spin-resolved photoluminescence spectroscopy (SR-PL) was employed to observe MoS₂, where the spin-polarized trions appear to be responsible for the MPE, leading to a valley magnetism. Results indicate that local FM order from the uncompensated surface of NiO could successfully induce significant valley spin-polarization in MoS₂ with the depolarization temperature approximately at 100 K, which is relatively high compared to related literature. This study reveals new perspectives and potential of AFM materials in the field of exchange-coupled van der Waals heterostructures.
Keywords
molybdenum disulfide; valleytronics; antiferromagnet; magnetic proximity effect
Subject
Physical Sciences, Condensed Matter Physics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
