Electrically tuned magnetic order and magnetoresistance in a topological insulator
文献类型：期刊论文
| 作者 | Zhang, ZC ; Feng, X ; Guo, MH ; Li, K ; Zhang, JS ; Ou, YB ; Feng, Y ; Wang, LL ; Chen, X ; He, K ; Ma, XC ; Xue, QK ; Wang, YY |
| 刊名 | NATURE COMMUNICATIONS
 |
| 出版日期 | 2014 |
| 卷号 | 5 |
| ISSN号 | 2041-1723 |
| 通讯作者 | He, K (reprint author), Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China. |
| 中文摘要 | The interplay between topological protection and broken time reversal symmetry in topological insulators may lead to highly unconventional magnetoresistance behaviour that can find unique applications in magnetic sensing and data storage. However, the magnetoresistance of topological insulators with spontaneously broken time reversal symmetry is still poorly understood. In this work, we investigate the transport properties of a ferromagnetic topological insulator thin film fabricated into a field effect transistor device. We observe a complex evolution of gate-tuned magnetoresistance, which is positive when the Fermi level lies close to the Dirac point but becomes negative at higher energies. This trend is opposite to that expected from the Berry phase picture, but is intimately correlated with the gate-tuned magnetic order. The underlying physics is the competition between the topology-induced weak antilocalization and magnetism-induced negative magnetoresistance. The simultaneous electrical control of magnetic order and magnetoresistance facilitates future topological insulator based spintronic devices. |
| 资助信息 | National Natural Science Foundation of China; Ministry of Science and Technology of China; Chinese Academy of Sciences |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/59381]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Zhang, ZC,Feng, X,Guo, MH,et al. Electrically tuned magnetic order and magnetoresistance in a topological insulator[J]. NATURE COMMUNICATIONS,2014,5. |
| APA | Zhang, ZC.,Feng, X.,Guo, MH.,Li, K.,Zhang, JS.,...&Wang, YY.(2014).Electrically tuned magnetic order and magnetoresistance in a topological insulator.NATURE COMMUNICATIONS,5. |
| MLA | Zhang, ZC,et al."Electrically tuned magnetic order and magnetoresistance in a topological insulator".NATURE COMMUNICATIONS 5(2014). |
入库方式： OAI收割
来源：物理研究所
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