题名 | Observation of the nonlinear Hall effect under time-reversal-symmetric conditions |
作者 | Ma, Qiong1; Xu, Su-Yang1; Shen, Huitao1; MacNeill, David1; Fatemi, Valla1; Chang, Tay-Rong2; Valdivia, Andres M. Mier1; Wu, Sanfeng1; Du, Zongzheng3,4,5,6; Hsu, Chuang-Han7,8,9; Fang, Shiang10; Gibson, Quinn D.11; Watanabe, Kenji12; Taniguchi, Takashi12; Cava, Robert J.11; Kaxiras, Efthimios10,13; Lu, Hai-Zhou3,4,5; Lin, Hsin14; Fu, Liang1; Gedik, Nuh1; Jarillo-Herrero, Pablo1
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通讯作者 | Gedik, Nuh; Jarillo-Herrero, Pablo |
发表日期 | 2019-01-17
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DOI | |
发表期刊 | |
ISSN | 0028-0836
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EISSN | 1476-4687
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卷号 | 565期号:7739页码:337-+ |
摘要 | The electrical Hall effect is the production, upon the application of an electric field, of a transverse voltage under an out-of-plane magnetic field. Studies of the Hall effect have led to important breakthroughs, including the discoveries of Berry curvature and topological Chern invariants(1,2). The internal magnetization of magnets means that the electrical Hall effect can occur in the absence of an external magnetic field(2); this 'anomalous' Hall effect is important for the study of quantum magnets(2-7). The electrical Hall effect has rarely been studied in non-magnetic materials without external magnetic fields, owing to the constraint of timer-eversal symmetry. However, only in the linear response regime-when the Hall voltage is linearly proportional to the external electric field-does the Hall effect identically vanish as a result of time-reversal symmetry; the Hall effect in the nonlinear response regime is not subject to such symmetry constraints(8-10). Here we report observations of the nonlinear Hall effect(10) in electrical transport in bilayers of the non-magnetic quantum material WTe2 under time-reversal-symmetric conditions. We show that an electric current in bilayer WTe2 leads to a nonlinear Hall voltage in the absence of a magnetic field. The properties of this nonlinear Hall effect are distinct from those of the anomalous Hall effect in metals: the nonlinear Hall effect results in a quadratic, rather than linear, current-voltage characteristic and, in contrast to the anomalous Hall effect, the nonlinear Hall effect results in a much larger transverse than longitudinal voltage response, leading to a nonlinear Hall angle (the angle between the total voltage response and the applied electric field) of nearly 90 degrees. We further show that the nonlinear Hall effect provides a direct measure of the dipole moment(10) of the Berry curvature, which arises from layer-polarized Dirac fermions in bilayer WTe2. Our results demonstrate a new type of Hall effect and provide a way of detecting Berry curvature in nonmagnetic quantum materials. |
相关链接 | [来源记录] |
收录类别 | |
语种 | 英语
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重要成果 | NI期刊
; NI论文
; ESI高被引
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学校署名 | 其他
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资助项目 | ARO MURI Award[W911NF-14-0247]
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WOS研究方向 | Science & Technology - Other Topics
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WOS类目 | Multidisciplinary Sciences
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WOS记录号 | WOS:000455781600037
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出版者 | |
ESI学科分类 | BIOLOGY & BIOCHEMISTRY;CLINICAL MEDICINE;MULTIDISCIPLINARY;PLANT & ANIMAL SCIENCE;ENVIRONMENT/ECOLOGY;SOCIAL SCIENCES, GENERAL;MICROBIOLOGY;ECONOMICS BUSINESS;IMMUNOLOGY;MATERIALS SCIENCE;COMPUTER SCIENCE;SPACE SCIENCE;MOLECULAR BIOLOGY & GENETICS;CHEMISTRY;NEUROSCIENCE & BEHAVIOR;PHYSICS;GEOSCIENCES;ENGINEERING
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Scopus记录号 | 2-s2.0-85060176578
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来源库 | Web of Science
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引用统计 |
被引频次[WOS]:387
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成果类型 | 期刊论文 |
条目标识符 | http://kc.sustech.edu.cn/handle/2SGJ60CL/26588 |
专题 | 量子科学与工程研究院 理学院_物理系 |
作者单位 | 1.MIT, Dept Phys, Cambridge, MA 02139 USA 2.Natl Cheng Kung Univ, Dept Phys, Tainan, Taiwan 3.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen, Peoples R China 4.Southern Univ Sci & Technol, Dept Phys, Shenzhen, Peoples R China 5.Shenzhen Key Lab Quantum Sci & Engn, Shenzhen, Peoples R China 6.Southeast Univ, Sch Phys, Nanjing, Jiangsu, Peoples R China 7.Natl Univ Singapore, Dept Phys, Singapore, Singapore 8.Natl Univ Singapore, Ctr Adv 2D Mat, Singapore, Singapore 9.Natl Univ Singapore, Graphene Res Ctr, Singapore, Singapore 10.Harvard Univ, Dept Phys, Cambridge, MA 02138 USA 11.Princeton Univ, Dept Chem, Princeton, NJ 08544 USA 12.Natl Inst Mat Sci, Tsukuba, Ibaraki, Japan 13.Harvard Univ, John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA 14.Acad Sinica, Inst Phys, Taipei, Taiwan |
推荐引用方式 GB/T 7714 |
Ma, Qiong,Xu, Su-Yang,Shen, Huitao,et al. Observation of the nonlinear Hall effect under time-reversal-symmetric conditions[J]. NATURE,2019,565(7739):337-+.
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APA |
Ma, Qiong.,Xu, Su-Yang.,Shen, Huitao.,MacNeill, David.,Fatemi, Valla.,...&Jarillo-Herrero, Pablo.(2019).Observation of the nonlinear Hall effect under time-reversal-symmetric conditions.NATURE,565(7739),337-+.
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MLA |
Ma, Qiong,et al."Observation of the nonlinear Hall effect under time-reversal-symmetric conditions".NATURE 565.7739(2019):337-+.
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