Magnetic order and noncollinear spin transport of domain walls based on zigzag graphene nanoribbons

发布时间： 2018-11-13 点击次数：

• 所属单位：理学院
• 发表刊物：JOURNAL OF APPLIED PHYSICS
• 关键字：ROOM-TEMPERATURE
• 摘要：Considering exotic spintronic properties, we propose by first-principles calculations that the domain walls (DWs) can form in zigzag graphene nanoribbon (ZGNR). The calculations based on the density functional theory and the non-equilibrium Green's function show that both abrupt and spiral DWs can exist in ZGNR depending on the initial magnetization conditions which can be implemented by the external magnetic field in experiments. Moreover, as the width of DW is small, a spiral DW is preferred. More importantly, the transmission at the Fermi level remains almost unchanged even when the relative angle (theta) between magnetization direction of two leads is up to 135 degrees. Such a characteristic indicates that the slight change in the direction of magnetization of ZGNR-based spintronic devices will not alter the conductance. On the other hand, as the width of DW is large, the magnetization distribution of DW is of spiral nature at small theta, but it will change from the spiral-like to abrupt-like when theta increases. Published by AIP Publishing.
• ISSN号：0021-8979
• 是否译文：否
• 合写作者：颜晓红,郭艳东,肖杨
• 通讯作者：颜晓红,张影
• 发表时间：2017-05-07