Improvement of valley splitting and valley injection efficiency for graphene/ferromagnet heterostructure
Xu Longxiang1, Lu Wengang2, 3, †, Hu Chen4, Guo Qixun1, Shang Shuai1, Xu Xiulan1, Yu Guanghua1, Yan Yu5, Wang Lihua6, Teng Jiao1, ‡
       

Band structures of the Cu/graphene/Au/Ni heterostructure. (a) When MX, the two valleys are degenerate. (b) When MZ, the two valleys split.