About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
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Symposium
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Advances in Emerging Electronic Nanomaterials: Synthesis, Enhanced Properties, Integration, and Applications
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Presentation Title |
Raman Spectroscopy Studies of Magneto-optical Effects in CrI<sub>3 |
Author(s) |
Wencan Jin |
On-Site Speaker (Planned) |
Wencan Jin |
Abstract Scope |
Two-dimensional (2D) magnetic materials have attracted great interest because of their potential applications in optoelectronic and spintronic devices. CrI<sub>3</sub> has been shown to be a layered antiferromagnet in its few-layer form. The layered antiferromagnet state can be switched to a fully spin-polarized state upon the application of an out-of-plane magnetic field, offering a new platform to explore the magneto-optical effects originating from the coupling between lattice, charge, orbital, and spin degrees of freedom. In this talk, I will present Raman spectroscopy studies of magneto-optical effects in atomically thin CrI<sub>3</sub>. First, I will show the presence of strong electron-phonon coupling and periodic broad modes up to 8th order in the resonant Raman spectra due to the polaronic character of excitons. Then, I will show a Davydov-split-induced N-fold multiplet in N-layer CrI<sub>3</sub> and discuss the layered-magnetism-coupled phonon scattering mechanism. Our work highlights the new opportunities for tailoring light-matter interactions in 2D magnets. |