Article Dans Une Revue Physical Review B Année : 2025

Magic-angle Bilayer Phononic Graphene

Résumé

Thanks to the recent discovery on the magic-angle bilayer graphene, twistronics is quickly becoming a burgeoning field in condensed matter physics. This letter expands the realm of twistronics to acoustics by introducing twisted bilayer phononic graphene, which remarkably also harbors the magic angle, evidenced by the associated ultra-flat bands. Beyond mimicking quantum mechanical behaviors of twisted bilayer graphene, we show that their acoustic counterpart offers a considerably more straightforward and robust way to alter the interlayer hopping strength, enabling us to unlock magic angles (> 3 • ) inaccessible in classical twisted bilayer graphene. This study, not only establishes the acoustical analog of twisted (magic-angle) bilayer graphene, providing a test bed more easily accessible to probe the interaction and misalignment between stacked 2D materials, but also points out the direction to a new phononic crystal design paradigm that could benefit applications such as enhanced acoustic emission and sensing.

Fichier principal
Vignette du fichier
Magic_angle_Bilayer_Phononic_Graphene.pdf (1.72 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte
Licence

Dates et versions

hal-04981036 , version 1 (06-03-2025)

Licence

Identifiants

Citer

Yuanchen Deng, Mourad Oudich, Nikhil Jrk Gerard, Jun Ji, Minghui Lu, et al.. Magic-angle Bilayer Phononic Graphene. Physical Review B, 2025, 102 (18), pp.180304. ⟨10.1103/PhysRevB.102.180304⟩. ⟨hal-04981036⟩
65 Consultations
180 Téléchargements

Altmetric

Partager

  • More