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Shen RS, Guo YD, Yan XH, Zeng HL, Liang MS, Chen P, Yang MS, Ni Y. Electrically controlled spin reversal and spin polarization of electronic transport in nanoporous graphene nanoribbons. Phys Chem Chem Phys 2021; 23:20702-20708. [PMID: 34516595 DOI: 10.1039/d1cp02547c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Based on first-principles calculations, the spin-dependent electronic transport of nanoporous graphene nanoribbons is investigated. A three-terminal configuration is proposed, which can electronically control the spin polarization of transmission, instead of magnetic methods. By modulating the gate voltage, not only could the transmission be switched between completely spin up and spin down polarized states to realize a dual-spin filter, but also the spin polarization could be finely tuned between 100% and -100%. Any ratio of spin up to spin down transport electrons can be realized, providing more possibilities for the design of nanoelectronic devices. Further analysis shows that the transmission spectra, with two distinct transmission peaks with opposite spins around EF, are the key point, which are contributed by p orbitals. And such a phenomenon is robust to the width and length of the nanoporous graphene nanoribbons, suggesting that it is an intrinsic feature of these systems. The electrical control on spin polarization is realized in pure-carbon systems, showing great application potential.
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Affiliation(s)
- Rui-Song Shen
- College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China.
| | - Yan-Dong Guo
- College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China. .,Key Laboratory of Radio Frequency and Micro Nano Electronics of Jiangsu Province, Nanjing 210023, China
| | - Xiao-Hong Yan
- College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China. .,Key Laboratory of Radio Frequency and Micro Nano Electronics of Jiangsu Province, Nanjing 210023, China.,College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.,School of Material Science and Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Hong-Li Zeng
- College of Natural Science, Nanjing University of Posts and Telecommunications, Nanjing 210046, China
| | - Miao-Shen Liang
- College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China.
| | - Pei Chen
- College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China.
| | - Mou-Shu Yang
- College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China.
| | - Yang Ni
- College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China.
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