CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Electrically controllable spin filtering in zigzag phosphorene nanoribbon based normal—antiferromagnet—normal junctions |
Ruigang Li(李锐岗)1, Jun-Feng Liu(刘军丰)1,†, and Jun Wang(汪军)2,‡ |
1 Department of Physics, Guangzhou University, Guangzhou 510006, China; 2 Department of Physics, Southeast University, Nanjing 210096, China |
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Abstract 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 2e2/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.
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Received: 14 May 2023
Revised: 06 September 2023
Accepted manuscript online: 09 September 2023
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PACS:
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73.23.-b
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(Electronic transport in mesoscopic systems)
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73.23.Ad
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(Ballistic transport)
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73.43.Cd
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(Theory and modeling)
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73.63.-b
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(Electronic transport in nanoscale materials and structures)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 12174077 and 12174051), the Science Foundation of GuangDong Province (Grant No. 2021A1515012363), and GuangDong Basic and Applied Basic Research Foundation (Grant No. 2022A1515110011). |
Corresponding Authors:
Jun-Feng Liu, Jun Wang
E-mail: phjfliu@gzhu.edu.cn;jwang@seu.edu.cn
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Cite this article:
Ruigang Li(李锐岗), Jun-Feng Liu(刘军丰), and Jun Wang(汪军) Electrically controllable spin filtering in zigzag phosphorene nanoribbon based normal—antiferromagnet—normal junctions 2024 Chin. Phys. B 33 017304
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