Electrically controllable spin filtering in zigzag phosphorene nanoribbon based normal–antiferromagnet–normal junctions  

作　　者：李锐岗 刘军丰 汪军 Ruigang Li;Jun-Feng Liu;Jun Wang(Department of Physics,Guangzhou University,Guangzhou 510006,China;Department of Physics,Southeast University,Nanjing 210096,China)

机构地区：[1]Department of Physics,Guangzhou University,Guangzhou 510006,China [2]Department of Physics,Southeast University,Nanjing 210096,China

出　　处：《Chinese Physics B》2024年第1期666-670,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos.12174077 and 12174051);the Science Foundation of GuangDong Province (Grant No.2021A1515012363);GuangDong Basic and Applied Basic Research Foundation (Grant No.2022A1515110011)。

摘　　要：We investigated the electric controllable spin-filtering effect in a zigzag phosphorene nanoribbon(ZPNR) based normal–antiferromagnet–normal junction. Two ferromagnets are closely coupled to the edges of the nanoribbon and form the edge-to-edge antiferromagnetism. Under an in-plane electric field, the two degenerate edge bands of the edge-to-edge antiferromagnet split into four spin-polarized sub-bands and a 100% spin-polarized current can be easily induced with the maximal conductance 2e~2/h. The spin polarization changes with the strength of the electric field and the exchange field,and changes sign at opposite electric fields. The spin-polarized current switches from one edge to the other by reversing the direction of the electric field. The edge current can also be controlled spatially by changing the electric potential of the scattering region. The manipulation of edge current is useful in spin-transfer-torque magnetic random-access memory and provides a practical way to develop controllable spintronic devices.

关 键 词：zigzag phosphorene electrically controllable spin filter quantum transport 

分 类 号：O469[理学—凝聚态物理]