反常霍尔效应的发现已有近百年的历史,但其产生的原因至今仍未有定论。Fe_3O_4为磁性半金属材料,其导电机制为电子的跳跃传导,因此......

For a graph G of size ε≥1 and its edge-induced subgraphs H1 and H2 of size γ(1 < γ < ε), H1 is said to be obtained ......