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He JJ, Guo FW, Ni HM, Yuan JR, Cui WD, Lu TY, Guo YD, Yan XH. Electrically modulated reversible dual-spin filter in zigzag β-SiC 7 nanoribbons. Phys Chem Chem Phys 2022; 24:25656-25662. [DOI: 10.1039/d2cp03379h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The introduced gate voltage allows β-SiC7 nanoribbons to behave as an excellent electrically modulated reversible dual spin filter with surprisingly accurate control of spin polarization.
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Affiliation(s)
- Jing-Jing He
- College of Information Science and Technology, Nanjing Forestry University, Nanjing, 210027, China
| | - Fang-Wen Guo
- College of Information Science and Technology, Nanjing Forestry University, Nanjing, 210027, China
| | - Hui-Min Ni
- College of Information Science and Technology, Nanjing Forestry University, Nanjing, 210027, China
| | - Jia-Ren Yuan
- School of Physics and Materials Science, Nanchang University, Nanchang, 330031, China
| | - Wen-Dou Cui
- College of Information Science and Technology, Nanjing Forestry University, Nanjing, 210027, China
| | - Tian-Yi Lu
- College of Information Science and Technology, Nanjing Forestry University, Nanjing, 210027, China
| | - Yan-Dong Guo
- College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210046, China
| | - Xiao-Hong Yan
- College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210046, China
- School of Material Science and Engineering, Jiangsu University, Zhenjiang, 212013, China
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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: 0.5] [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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Cullen JH, Bhalla P, Marcellina E, Hamilton AR, Culcer D. Generating a Topological Anomalous Hall Effect in a Nonmagnetic Conductor: An In-Plane Magnetic Field as a Direct Probe of the Berry Curvature. PHYSICAL REVIEW LETTERS 2021; 126:256601. [PMID: 34241516 DOI: 10.1103/physrevlett.126.256601] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 04/22/2021] [Accepted: 05/27/2021] [Indexed: 06/13/2023]
Abstract
We demonstrate that the Berry curvature monopole of nonmagnetic two-dimensional spin-3/2 holes leads to a novel Hall effect linear in an applied in-plane magnetic field B_{∥}. Remarkably, all scalar and spin-dependent disorder contributions vanish to leading order in B_{∥}, while there is no Lorentz force and hence no ordinary Hall effect. This purely intrinsic phenomenon, which we term the anomalous planar Hall effect (APHE), provides a direct transport probe of the Berry curvature accessible in all p-type semiconductors. We discuss experimental setups for its measurement.
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Affiliation(s)
- James H Cullen
- School of Physics, The University of New South Wales, Sydney 2052, Australia
- Australian Research Council Centre of Excellence in Low-Energy Electronics Technologies, The University of New South Wales, Sydney 2052, Australia
| | - Pankaj Bhalla
- Australian Research Council Centre of Excellence in Low-Energy Electronics Technologies, The University of New South Wales, Sydney 2052, Australia
- Beijing Computational Science Research Center, 100193 Beijing, China
| | - E Marcellina
- School of Physics, The University of New South Wales, Sydney 2052, Australia
- Australian Research Council Centre of Excellence in Low-Energy Electronics Technologies, The University of New South Wales, Sydney 2052, Australia
| | - A R Hamilton
- School of Physics, The University of New South Wales, Sydney 2052, Australia
- Australian Research Council Centre of Excellence in Low-Energy Electronics Technologies, The University of New South Wales, Sydney 2052, Australia
| | - Dimitrie Culcer
- School of Physics, The University of New South Wales, Sydney 2052, Australia
- Australian Research Council Centre of Excellence in Low-Energy Electronics Technologies, The University of New South Wales, Sydney 2052, Australia
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Giant Zeeman-type spin splitting of free electron/hole states on quasi-2D perovskite niobates: a theoretical prediction. Sci Rep 2020; 10:3698. [PMID: 32111910 PMCID: PMC7048772 DOI: 10.1038/s41598-020-60653-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Accepted: 02/17/2020] [Indexed: 11/08/2022] Open
Abstract
We study the spin-orbit interaction of two-dimensional electron/hole gas (2DEGs/2DHGs) on quasi-2D potassium niobates (KNs) via first-principles calculations. The strong surface polarity changes the free surface states from 2DEGs to 2DHGs. The in-plane dipole maintained on 2D models leads to giant Zeeman-type spin splitting, as high as 566 meV for the (001)c facet KN and 1.21 eV for the (111)c facet KN. The thickness-dependent Zeeman-type spin splitting shows a linear relation with respect to 1/r, while the corresponding in-plane polarization quantum has a linear relation of 1/(2^0.5)with respect to a decrease in thickness. Interestingly, the 2DHGs with molecular-like orbital character is solely constituted by O 2p states, showing logic switchable behavior at extremely thin samples with enormous Zeeman-type splitting that can switch between insulator and conductor by opposite spin polarization.
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