Cavicchi, L., Reijnders, K. J. A., Katsnelson, M. I., & Polini, M. (2024). Optical properties, plasmons, and orbital Skyrme textures in twisted TMDs. arXiv preprint arXiv:2410.18025.
This study investigates the impact of real-space topology, specifically orbital Skyrme textures, on the optical and plasmonic properties of twisted transition metal dichalcogenide (TMD) bilayers. The researchers aim to demonstrate that bulk plasmons can serve as a probe for these topological features.
The researchers employ a combination of theoretical approaches, including:
The research concludes that bulk plasmons in twisted TMD bilayers can effectively probe orbital Skyrme textures. The gapped behavior of these plasmons is linked to the effective magnetic field arising from the skyrmion lattice. While an effective magnetic field description provides a qualitative understanding, accurate quantitative results necessitate a comprehensive quantum treatment.
This study significantly contributes to the understanding of the interplay between real-space topology and the optical and plasmonic properties of twisted TMDs. The findings have implications for the development of novel optoelectronic and plasmonic devices based on these materials.
The study primarily focuses on the long-wavelength limit and utilizes the RPA, which might not fully capture the complexities of strongly correlated systems. Future research could explore non-perturbative approaches, such as exact diagonalization or the Bijl-Feynman single-mode approximation, to account for strong electron-electron interactions. Additionally, investigating the impact of real-space variations in the skyrmion magnetic field on non-local corrections to the plasmon dispersion at finite wave vectors is crucial for a more complete understanding.
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by Lorenzo Cavi... at arxiv.org 10-24-2024
https://arxiv.org/pdf/2410.18025.pdfDeeper Inquiries