Improvement of valley splitting and valley injection efficiency for graphene/ferromagnet heterostructure

Xu Longxiang¹, Lu Wengang^{2, 3, †}, Hu Chen⁴, Guo Qixun¹, Shang Shuai¹, Xu Xiulan¹, Yu Guanghua¹, Yan Yu⁵, Wang Lihua⁶, Teng Jiao^{1, ‡}

Valley-polarized transport properties for the system shown in Fig. 3(a). (a), (b) The valley-dependent I–V characters when M ∥ X and M ∥ Z, respectively. The inset in (b) shows the valley-injecting efficiency (η) when M ∥ X and M ∥ Z.