Tunneling magnetoresistance based on a Cr/graphene/Cr magnetotunnel junction*
Luan Gui-Pinga), Zhang Pei-Rana), Jiao Naa), Sun Li-Zhongb)
       
(a) The k ∥-resolved transmission conductance through bulk Cr along the (111) direction and through the Cr/graphene/Cr MTJ. (b), (c) Band structures of graphene with a 1 × 1 unit cell and a supercell, respectively. (d) Band structure of the Cr/graphene/Cr MTJ; the red dots represent the contribution of the carbon states to the band derived from the projection of the wave function to the specific band according to different k points. The size of the red dots denotes the relative magnitude of the contribution of the carbon states to different k points. The projected density of state of graphene onto the total bands. The Fermi level is set to zero and the high-symmetry points are G = (0, 0, 0), K = (−1/3, 2/3, 0), and M = (0, 1/2, 0).