The nonlinear Hall effect (NLHE), the phenomenon in which a transverse voltage can be produced without a magnetic field, provides a potential alternative for rectification or frequency doubling1,2. However, the low-temperature detection of the NLHE limits its applications3,4. Here, we report the room-temperature NLHE in a type-II Weyl semimetal TaIrTe4, which hosts a robust NLHE due to broken inversion symmetry and large band overlapping at the Fermi level. We also observe a temperature-induced sign inversion of the NLHE in TaIrTe4. Our theoretical calculations suggest that the observed sign inversion is a result of a temperature-induced shift in the chemical potential, indicating a direct correlation of the NLHE with the electronic structure at the Fermi surface. Finally, on the basis of the observed room-temperature NLHE in TaIrTe4 we demonstrate the wireless radiofrequency (RF) rectification with zero external bias and magnetic field. This work opens a door to realizing room-temperature applications based on the NLHE in Weyl semimetals.
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This research was supported by the SpOT-LITE programme (A*STAR grant no. 18A6b0057) through RIE2020 funds from Singapore and Singapore Ministry of Education AcRF Tier 1 (R-263-000-D61-114). P.Y. was supported by the ‘100 Top Talents Program’ of Sun Yat-sen University (no. 29000-18841216) and the ‘Young-teacher Training Program’ of Sun Yat-sen University (no. 29000-31610036). C.-H.H. and G.L. were supported by MOE-AcRF Tier-II: MOE2017-T2-1-114. G.E. acknowledges support from the Ministry of Education (MOE), Singapore, under AcRF Tier 2 (MOE2017-T2-1-134). T.-R.C. was supported by MOST109-2636-M-006-002 and MOST107-2627-E-006-001, National Cheng Kung University, Taiwan, and the National Center for Theoretical Sciences, Taiwan.
The authors declare no competing interests.
Peer review information Nature Nanotechnology thanks Hai-Zhou Lu and the other, anonymous, reviewer(s) for their contribution to the peer review of this work.
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Kumar, D., Hsu, CH., Sharma, R. et al. Room-temperature nonlinear Hall effect and wireless radiofrequency rectification in Weyl semimetal TaIrTe4. Nat. Nanotechnol. 16, 421–425 (2021). https://doi.org/10.1038/s41565-020-00839-3