Enhancement of magnetoresistance and current spin polarization in single-molecule junctions by manipulating the hybrid interface states via anchoring groups
| Autor: | Gui-Chao Hu, Chuan-Kui Wang, Shuai Qiu, Yuanyuan Miao, Guang-Ping Zhang, Junfeng Ren |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Spintronics Spin polarization Magnetoresistance Condensed matter physics 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Electronegativity Atomic orbital 0103 physical sciences Atom Condensed Matter::Strongly Correlated Electrons Density functional theory 0210 nano-technology Quantum tunnelling |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 479:247-253 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/j.jmmm.2019.02.011 |
| Popis: | Based on density functional theory combined with nonequilibrium Green’s function method, the spin polarization of hybrid interface states in magnetic molecular junctions and their roles in spin-dependent transport are investigated. The results demonstrate that by choosing anchoring atoms with different types of outer orbitals, the spin polarization of the hybrid interface states can be tuned. A dependence of the spin polarization on the atomic electronegativity is revealed, where a high spin polarization is achieved in the case of O atom with large electronegativity. The transport calculation shows that a corresponding adjustable spin-dependent transport is realized, where an enhanced tunneling magnetoresistance and a large spin filtering efficiency are realized by using the anchoring atoms with large electronegativity. This work proposes a valid way to enhance the functionality of molecular spintronic devices by manipulating the hybrid interface states. |
| Databáze: | OpenAIRE |
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