Unveiling circular phonon dynamics via high-harmonic spectroscopy (opens in new tab)

Author(s): Navdeep Rana, David A. Reis, and Gopal DixitWe demonstrate that coherent circular phonons modulate high-harmonic generation (HHG) in graphene, revealing a direct connection between rotational phonon dynamics and subcycle electronic responses. While monolayer graphene yields only odd-order harmonics due to inversion symmetry, the excitation of…[Phys. Rev. B 113, 224310] Published Mon Jun 15, 2026