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Chin. Phys. B, 2017, Vol. 26(6): 067201    DOI: 10.1088/1674-1056/26/6/067201
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Spin-filter effect and spin-polarized optoelectronic properties in annulene-based molecular spintronic devices

Zhiyuan Ma(马志远)1, Ying Li(李莹)1, Xian-Jiang Song(宋贤江)1, Zhi Yang(杨致)1, Li-Chun Xu(徐利春)1, Ruiping Liu(刘瑞萍)1, Xuguang Liu(刘旭光)2,3, Dianyin Hu(胡殿印)4,5
1 College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China;
2 Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China;
3 College 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
Abstract  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 spin-polarized 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.
Keywords:  annulene molecular      molecular spintronic devices      quantum transport properties     
Received:  16 November 2016      Published:  05 June 2017
PACS:  72.10.-d (Theory of electronic transport; scattering mechanisms)  
  72.10.Fk (Scattering by point defects, dislocations, surfaces, and other imperfections (including Kondo effect))  
  05.60.Gg (Quantum transport)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. U1510132, U1610255, 51401142, and 11604235), the Key Innovative Research Team in Science and Technology of Shanxi Province, China (Grant No. 201605D131045-10), the Natural Science Foundation of Shanxi Province, China (Grant Nos. 2015021027 and 2016021030), the Scientific and Technological Innovation Program of the Higher Education Institutions of Shanxi Province, China (Grant No. 2016140), and the Program for the Outstanding Innovative Teams of the Higher Learning Institutions of Shanxi Province, China.
Corresponding Authors:  Zhi Yang     E-mail:  yangzhi@tyut.edu.cn

Cite this article: 

Zhiyuan Ma(马志远), Ying Li(李莹), Xian-Jiang Song(宋贤江), Zhi Yang(杨致), Li-Chun Xu(徐利春), Ruiping Liu(刘瑞萍), Xuguang Liu(刘旭光), Dianyin Hu(胡殿印) Spin-filter effect and spin-polarized optoelectronic properties in annulene-based molecular spintronic devices 2017 Chin. Phys. B 26 067201

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