Switching behaviors of butadienimine molecular devices sandwiched between graphene nanoribbons electrodes

摘要

The switching behavior of butadienimine molecule with two tautomeric forms sandwiched between different graphene nanoribbons (GNRs) electrodes are investigated by applying nonequilibrium Green's function formalism combined with first-principles density functional theory. The calculated results show that the edge geometry of GNRs electrodes play a significant role in determining the electronic transport properties and switching behavior of the butadienimine molecular junctions. A higher current switching ratio can be obtained for the molecular junctions with zigzag edged graphene nanoribbons, which suggests that this system has a broader application in future logic and memory devices. (C) 2017 The Japan Society of Applied Physics