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Article Dans Une Revue Applied Physics Letters Année : 2022

Twisted pillared phononic crystal plates

Résumé

Recent discoveries in twisted heterostructure materials have opened research directions in classical wave systems. This Letter investigates a family of double-sided pillared phononic crystal plates as the elastodynamic analog of bilayer graphene, including twisted bilayer graphene. The phononic crystal plate design is first validated by studying the basic AA- and AB-stack configurations under weak interlayer coupling. A specific commensurate twist angle giving rise to the sublattice exchange even symmetry is then studied to examine the twist-modulated band structure. Finally, this study demonstrates that the same twist angle, in concert with an ultra-strong interlayer coupling, can collectively create valley-dependent edge states that have not been previously observed in electronic bilayer graphene.
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Dates et versions

hal-04032524 , version 1 (16-03-2023)

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Citer

Mourad Oudich, Yuanchen Deng, Yun Jing. Twisted pillared phononic crystal plates. Applied Physics Letters, 2022, 120 (23), pp.232202. ⟨10.1063/5.0097082⟩. ⟨hal-04032524⟩
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