Room-Temperature Manipulation of Spin Texture in a Dirac Semimetal

Wang，An Qi1,2; Xiang，Peng Zhan1; Ye，Xing Guo1; Zheng，Wen Zhuang1; Yu，Dapeng3; Liao，Zhi Min1,4

2020-11-18

10.1103/PhysRevApplied.14.054044

Physical Review Applied   影响因子和分区

2331-7019

2331-7019

Charge-current-induced spin-polarized current, via spin-momentum-locked states, is very attractive for spintronics. The orientation of spin polarization caused by an electric field depends on the helicity of the spin texture, which is normally opposite for typical topological surface states and Rashba states. Here, we report the manipulation of the two opposite spin textures in Dirac semimetal Cd3As2 nanoplates. Spin-polarized transport signals originated from topological surface states are detected through Hall-bar-like Co electrodes, showing a maximum at the Dirac point and robustness up to room temperature. By comparison, opposite helicity of the spin texture is measured by applying Co electrodes across the whole nanoplate. Furthermore, it is found that the opposite spin texture is only localized underneath the electrodes, and the spin texture of topological surface states can be singled out by a nonlocal device geometry. The results show that the clockwise and counterclockwise spin textures can be achieved simultaneously in a single Dirac semimetal device by patterning metal electrodes with different configurations, which are promising for future spintronic applications.

SCI ; EI

英语

其他

National Key Research and Development Program of China[2018YFA0703703][2016YFA0300802] ; NSFC[91964201][61825401][11774004]

Physics

Physics, Applied

WOS:000591952200005

AMER PHYSICAL SOC

20205109624143

Cobalt ; Textures ; Topology ; Electric fields ; Spintronics ; Surface states ; Adsorption ; Nanostructures ; Spin polarization ; Cadmium compounds ; Room temperature

Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Nanotechnology:761 ; Magnetoelectronics (Spintronics):762 ; Chemical Operations:802.3 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4 ; Classical Physics; Quantum Theory; Relativity:931 ; High Energy Physics; Nuclear Physics; Plasma Physics:932 ; High Energy Physics:932.1 ; Solid State Physics:933

2-s2.0-85097578041

Scopus

1.State Key Laboratory for Mesoscopic Physics,Frontiers Science Center for Nano-optoelectronics,School of Physics,Peking University,Beijing,100871,China
2.Academy for Advanced Interdisciplinary Studies,Peking University,Beijing,100871,China
3.Institute for Quantum Science and Engineering,Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
4.Beijing Key Laboratory of Quantum Devices,Peking University,Beijing,100871,China

Wang，An Qi,Xiang，Peng Zhan,Ye，Xing Guo,et al. Room-Temperature Manipulation of Spin Texture in a Dirac Semimetal[J]. Physical Review Applied,2020,14(5).

Wang，An Qi,Xiang，Peng Zhan,Ye，Xing Guo,Zheng，Wen Zhuang,Yu，Dapeng,&Liao，Zhi Min.(2020).Room-Temperature Manipulation of Spin Texture in a Dirac Semimetal.Physical Review Applied,14(5).

Wang，An Qi,et al."Room-Temperature Manipulation of Spin Texture in a Dirac Semimetal".Physical Review Applied 14.5(2020).