Electron-photon Chern number in cavity-embedded 2D moir\'e materials

• URL: http://arxiv.org/abs/2303.08804v2
• Date: Tue, 26 Sep 2023 10:01:23 GMT
• Title: Electron-photon Chern number in cavity-embedded 2D moir\'e materials
• Authors: Danh-Phuong Nguyen, Geva Arwas, Zuzhang Lin, Wang Yao, Cristiano Ciuti
• Abstract summary: topological properties of 2D materials can be manipulated by cavity quantum electromagnetic fields for both resonant and off-resonant electron-photon coupling. We show that when the cavity mode is resonant to electronic miniband transitions, new and higher electron-photon Chern numbers can emerge.
• Score: 0.9499648210774584
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We explore theoretically how the topological properties of 2D materials can be manipulated by cavity quantum electromagnetic fields for both resonant and off-resonant electron-photon coupling, with a focus on van der Waals moir\'e superlattices. We investigate an electron-photon topological Chern number for the cavity-dressed energy minibands that is well defined for any degree of hybridization of the electron and photon states. While an off-resonant cavity mode can renormalize electronic topological phases that exist without cavity coupling, we show that when the cavity mode is resonant to electronic miniband transitions, new and higher electron-photon Chern numbers can emerge.

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