TY - RPRT TI - Ultrafast valley polarization in bilayer graphene AU - Kumar, Pardeep AU - Herath, Thakshila M. AU - Apalkov, Vadym PY - 2021 DO - 10.1063/5.0060138 UR - https://www.osti.gov/biblio/1978945 ID - 1978945 ER -