Observation of nonreciprocal magnetophonon effect in nonencapsulated few-layered CrI<sub>3</sub>.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 33097544.
- Also identified by DOI 10.1126/sciadv.abc7628 and PMC identifier 7608833.
- Licence recorded as CC BY-NC.
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Abstract
"Magneto-optical" effect refers to a rotation of polarization plane, which has been widely studied in traditional ferromagnetic metal and insulator films and scarcely in two-dimensional layered materials. Here, we uncover a new nonreciprocal magnetophonon Raman scattering effect in ferromagnetic few-layer CrI<sub>3</sub> We observed a rotation of the polarization plane of inelastically scattered light between -20<sup>o</sup> and +60<sup>o</sup> that are tunable by an out-of-plane magnetic field from -2.5 to 2.5 T. It is experimentally observed that the degree of polarization can be magnetically manipulated between -20 and 85%. This work raises a new magneto-optical phenomenon and could create opportunities of applying two-dimensional ferromagnetic materials in Raman lasing, topological photonics, and magneto-optical modulator for information transport and storage.