Spin-filter effect and spin-polarized optoelectronic properties in annulene-based molecular spintronic devices
Using Fe, Co or Ni chains as electrodes, we designed several annulene-based molecular spintronic devices and investigated the quantum transport properties based on density functional theory and non-equilibrium Green＇s function method.Our results show that these devices have outstanding spin-filter c...
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| Published in | Chinese physics B Vol. 26; no. 6; pp. 329 - 337 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.06.2017
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| Online Access | Get full text |
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| Summary: | Using Fe, Co or Ni chains as electrodes, we designed several annulene-based molecular spintronic devices and investigated the quantum transport properties based on density functional theory and non-equilibrium Green＇s function method.Our results show that these devices have outstanding spin-filter capabilities and exhibit giant magnetoresistance effect,and that with Ni chains as electrodes, the device has the best transport properties. Furthermore, we investigated the spinpolarized optoelectronic properties of the device with Ni electrodes and found that the spin-polarized photocurrents can be directly generated by irradiating the device with infrared, visible or ultraviolet light. More importantly, if the magnetization directions of the two electrodes are antiparallel, the photocurrents with different spins are spatially separated, appearing at different electrodes. This phenomenon provides a new way to simultaneously generate two spin currents. |
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| Bibliography: | annulene molecular, molecular spintronic devices, quantum transport properties Using Fe, Co or Ni chains as electrodes, we designed several annulene-based molecular spintronic devices and investigated the quantum transport properties based on density functional theory and non-equilibrium Green＇s function method.Our results show that these devices have outstanding spin-filter capabilities and exhibit giant magnetoresistance effect,and that with Ni chains as electrodes, the device has the best transport properties. Furthermore, we investigated the spinpolarized optoelectronic properties of the device with Ni electrodes and found that the spin-polarized photocurrents can be directly generated by irradiating the device with infrared, visible or ultraviolet light. More importantly, if the magnetization directions of the two electrodes are antiparallel, the photocurrents with different spins are spatially separated, appearing at different electrodes. This phenomenon provides a new way to simultaneously generate two spin currents. Zhiyuan Ma1, Ying Li1, Li-Chun Xu1, Ruiping Liu1, Xian-Jiang Song1, Zhi Yang1, Xuguang Liu2,3, and Dianyin Hu4,5 （ 1 College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China ;2Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China ;3College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China ;4 School of Energy and Power Engineering, Beihang University, Beijing 100191, China; 5 Beijing Key Laboratory of Aero-Engine Structure and Strength, Beijing 100191, China） 11-5639/O4 |
| ISSN: | 1674-1056 2058-3834 |
| DOI: | 10.1088/1674-1056/26/6/067201 |