Enhancing the spin transfer torque in magnetic tunnel junctions by ac modulation
文献类型：期刊论文
| 作者 | Chen, Xiaobin1,2; Zhou, Chenyi2; Zhang, Zhaohui3; Chen, Jingzhe4; Zheng, Xiaohong2,5 ; Zhang, Lei2,6,7; Hu, Can-Ming3; Guo, Hong1,2
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| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2017-03-13 |
| 卷号 | 95期号:11页码:1-23 |
| DOI | 10.1103/PhysRevB.95.115417 |
| 文献子类 | Article |
| 英文摘要 | The phenomenon of spin transfer torque (STT) has attracted a great deal of interest due to its promising prospects in practical spintronic devices. In this paper, we report a theoretical investigation of STT in a noncollinear magnetic tunnel junction under ac modulation based on the nonequilibrium Green's-function formalism, and we derive a closed formulation for predicting the time-averaged STT. Using this formulation, the ac STT of a carbon-nanotube-based magnetic tunnel junction is analyzed. Under ac modulation, the low-bias linear (quadratic) dependence of the in-plane (out-of-plane) torque on bias still holds, and the sin. dependence on the noncollinear angle is maintained. By photon-assisted tunneling, the bias-induced components of the in-plane and out-of-plane torques can be enhanced significantly, about 12 and 75 times, respectively. Our analysis reveals the condition for achieving optimized STT enhancement and suggests that ac modulation is a very effective way for electrical manipulation of STT. |
| WOS关键词 | TRANSPORT |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000396008800010 |
| 资助机构 | Natural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC) |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/32933]  |
| 专题 | 合肥物质科学研究院_中科院固体物理研究所 |
| 作者单位 | 1.Shenzhen Univ, Coll Phys & Energy, Shenzhen 518060, Peoples R China 2.McGill Univ, Dept Phys, Ctr Phys Mat, Montreal, PQ H3A 2T8, Canada 3.Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada 4.Shanghai Univ, Dept Phys, Shanghai 200444, Peoples R China 5.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China 6.Shanxi Univ, State Key Lab Quantum Opt & Quantum Opt Devices, Inst Laser Spect, Taiyuan 030006, Peoples R China 7.Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Xiaobin,Zhou, Chenyi,Zhang, Zhaohui,et al. Enhancing the spin transfer torque in magnetic tunnel junctions by ac modulation[J]. PHYSICAL REVIEW B,2017,95(11):1-23. |
| APA | Chen, Xiaobin.,Zhou, Chenyi.,Zhang, Zhaohui.,Chen, Jingzhe.,Zheng, Xiaohong.,...&Guo, Hong.(2017).Enhancing the spin transfer torque in magnetic tunnel junctions by ac modulation.PHYSICAL REVIEW B,95(11),1-23. |
| MLA | Chen, Xiaobin,et al."Enhancing the spin transfer torque in magnetic tunnel junctions by ac modulation".PHYSICAL REVIEW B 95.11(2017):1-23. |
入库方式： OAI收割
来源：合肥物质科学研究院
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