26ème Congrès Général de la SFP

Electron-photon Chern number in cavity-embedded 2D moiré materials

Non programmé

20m

Centre des Congrès de la Villette (Cité des sciences et de l'Industrie, Paris)

Poster MC21 Matériaux quantiques : des prédictions à l'observation Session Poster 2: MC1, MC4, MC8, MC10, MC12, MC14, MC20, MC21, MC23, MC24, MC25, REDP

Orateur

Danh-Phuong Nguyen (Université Paris Cité, CNRS, Matériaux et Phénomènes Quantiques (MPQ))

Description

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 moiré 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.

[1] Danh-Phuong Nguyen, Geva Arwas, Zuzhang Lin, Wang Yao and Cristiano Ciuti, Electron-photon Chern number in cavity embedded 2D moiré materials [arXiv:2303.08804]

Documents de présentation

poster_SFP.pdf