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Published (Version of record)CC BY V4.0, Open Access
Published (Version of record)CC BY V4.0, Open Access
Journal article
Giant c-axis nonlinear anomalous Hall effect in Td-MoTe2 and WTe2
Nature communications, Vol.12(1), pp.1-8
01/Dec/2021
PMID: 33824340
Abstract
While the anomalous Hall effect can manifest even without an external magnetic field, time reversal symmetry is nonetheless still broken by the internal magnetization of the sample. Recently, it has been shown that certain materials without an inversion center allow for a nonlinear type of anomalous Hall effect whilst retaining time reversal symmetry. The effect may arise from either Berry curvature or through various asymmetric scattering mechanisms. Here, we report the observation of an extremely large c-axis nonlinear anomalous Hall effect in the non-centrosymmetric Td phase of MoTe2 and WTe2 without intrinsic magnetic order. We find that the effect is dominated by skew-scattering at higher temperatures combined with another scattering process active at low temperatures. Application of higher bias yields an extremely large Hall ratio of E⊥/E|| = 2.47 and corresponding anomalous Hall conductivity of order 8 × 107 S/m.
Details
- Title
- Giant c-axis nonlinear anomalous Hall effect in Td-MoTe2 and WTe2
- Creators
- Archana Tiwari - University of WaterlooFangchu Chen - University of WaterlooShazhou Zhong - University of WaterlooElizabeth Drueke - University of Michigan–Ann ArborJahyun Koo - 972WIS_INST___90Austin Kaczmarek - University of Michigan–Ann ArborCong Xiao - The University of Texas at AustinJingjing Gao - Institute of Solid State PhysicsXuan Luo - Institute of Solid State PhysicsQian Niu - The University of Texas at AustinYuping Sun - Institute of Solid State PhysicsBinghai Yan - 972WIS_INST___90Liuyan Zhao - University of Michigan–Ann ArborAdam W. Tsen (Corresponding Author) - University of Waterloo
- Resource Type
- Journal article
- Publication Details
- Nature communications, Vol.12(1), pp.1-8; 01/Dec/2021
- Number of pages
- 8
- Publisher
- Nature Publishing Group
- Language
- English
- DOI
- https://doi.org/10.1038/s41467-021-22343-5
- PMID
- 33824340
- Grant note
- We thank Kin Fai Mak for helpful discussions and a critical reading of our manuscript, Christopher Gutierrez for assistance with the device schematic, and Peng Li for assistance with initial measurements. AWT acknowledges support from the US Army Research Office (W911NF-19-10267), Ontario Early Researcher Award (ER17-13-199), and the National Science and Engineering Research Council of Canada (RGPIN-2017-03815). This research was undertaken thanks in part to funding from the Canada First Research Excellence Fund. LZ acknowledges the support by the National Science Foundation (NSF) CAREER Award (DMR-1749774). ED acknowledges support by the NSF Graduate Research Fellowship Program (DGE-1256260). BY acknowledges financial support by the Willner Family Leadership Institute for the Weizmann Institute of Science, the Benoziyo Endowment Fund for the Advancement of Science, the Ruth and Herman Albert Scholars Program for New Scientists, and the European Research Council under the European Union’s Horizon 2020 research and innovation programme (Grant No. 815869). X.L. and Y.P.S. thank the support of the National Key Research and Development Program under contract 2016YFA0300404, the National Nature Science Foundation of China under contracts 11674326, 11874357, and the Joint Funds of the National Natural Science Foundation of China and the Chinese Academy of Sciences’ Large-Scale Scientific Facility under contracts U1832141, U1932217. C.X. and Q.N. were supported by the NSF (EFMA-1641101) and Welch Foundation (F-1255). Author contributions - A.T. and A.W.T. conceived and designed the experiments. F.C. and J.G. grew and characterized the MoTe2 and WTe2 crystals under the guidance of X.L. and Y.P.S. A.T. fabricated the devices and performed the transport measurements. S.Z. performed the finite element method simulations. E.D. and A.K. performed the optical second harmonic generation measurements under the guidance of L.Z. J.K. performed the density functional theory calculations under the guidance of B.Y. A.T. and A.W.T. analyzed the data together with C.X. and Q.N. and wrote the manuscript with input from all authors.
- Record Identifier
- 993268694703596
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