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

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.