▎ 摘　　要

High mobility graphene field-effect devices, fabricated on the complex-oxide heterostructure LaAlO3/SrTiO3, exhibit quantum interference signatures up to room temperature. The oxide material is believed to play a critical role in suppressing short-range and phonon contributions to scattering. The ability to maintain pseudospin coherence at room temperature holds promise for the realization of new classical and quantum information technologies.