Room-temperature nonlinear Hall effect and wireless radiofrequency rectification in Weyl semimetal TaIrTe4

• Published in: Nature nanotechnology Vol. 16; no. 4; pp. 421 - 425
• Main Authors: Kumar, Dushyant, Hsu, Chuang-Han, Sharma, Raghav, Chang, Tay-Rong, Yu, Peng, Wang, Junyong, Eda, Goki, Liang, Gengchiau, Yang, Hyunsoo
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 01.04.2021; Nature Publishing Group
• Subjects: 639/301/1005/1007; 639/925/357; 639/925/357/1018; 639/925/927; 639/925/927/1007; Chemical potential; Chemistry and Materials Science; Electromagnetism; Electronic structure; Fermi surfaces; Hall effect; Letter; Low temperature; Magnetic fields; Materials Science; Metalloids; Nanotechnology; Nanotechnology and Microengineering; Radio frequency; Room temperature; Symmetry
• ISSN: 1748-3387; 1748-3395; 1748-3395
• DOI: 10.1038/s41565-020-00839-3

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 doubling 1 , 2 . However, the low-temperature detection of the NLHE limits its applications 3 , 4 . Here, we report the room-temperature NLHE in a type-II Weyl semimetal TaIrTe 4 , 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 TaIrTe 4 . 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 TaIrTe 4 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. Broken inversion symmetry in a type-II Weyl semimetal TaIrTe 4 enables observation of the room-temperature nonlinear Hall effect as well as wireless radiofrequency rectification.