Speaker
Description
Van der Waals (vdW) materials and their heterostructures exhibit remarkable electronic and optical properties that can be finely tuned using external physical fields such as photonic, magnetic, electric, and strain, or through proximity effects with other materials and molecules. These attributes position them as superior building blocks for cutting-edge optoelectronic and spintronic devices.
Raman (Ra) and photoluminescence (PL) micro-spectroscopies stand out as pivotal tools for delving into the electronic, optical, and spin phenomena within vdW and their heterostructures. Leveraging light with intrinsic chirality, these spectroscopic techniques offer a window into spin and valley-driven physics across diverse $2$DMs. Of particular significance, Ra and PL spectroscopies facilitate the exploration of magnetic order and quantum phenomena in van der Waals materials, owing to the robust spin-lattice coupling [1, 2]. Notably, recent advancements have unveiled the potential of the Ra/PL microscopy in elucidating magnetization reversal and magnetic domain mapping in various $2$D magnets and their heterostructures under applied magnetic fields. In this presentation, I will showcase selected findings from helicity-resolved cryomagnetic spectro-microscopies conducted on prominent $2$DMs, shedding light on their intriguing properties and potential applications.
Acknowledgements
The work was supported by the project AMULET, CZ.02.01.01/00/22_008/0004558.
References
[1] V. Varade et al., “Chiral Light Emission from a Hybrid Magnetic Molecule–Monolayer Transition Metal Dichalcogenide Heterostructure,” ACS Nano, vol. 17, no. 3. American Chemical Society (ACS), pp. 2170–2181, Jan. 18, 2023. https://doi.org/10.1021/acsnano.2c08320
[2] A. Ghosh et al., “Exotic magnetic and electronic properties of layered CrI3 single crystals under high pressure,” Physical Review B, vol. 105, no. 8. American Physical Society (APS), Feb. 08, 2022. https://doi.org/10.1103/physrevb.105.l081104
