2022
DOI: 10.48550/arxiv.2204.08060
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Giant Shear Displacement by Light-Induced Raman Force in Bilayer Graphene

Abstract: Coherent excitation of shear phonons in van der Waals layered materials is a non-destructive mechanism to fine-tune the electronic state of the system. We develop a diagrammatic theory for the displacive Raman force and apply it to the shear phonon's dynamics. We obtain a rectified Raman force density in bilayer graphene of the order of F ∼ 10nN/nm 2 leading to a giant shear displacement Q0 ∼ 50pm for an intense infrared laser. We discuss both circular and linear displacive Raman forces. We show that the laser… Show more

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