Topological surface state dominated nonlinear Hall effect and microwave rectification at room temperature

Nonlinear Hall effect(NLHE) as a recently discovered phenomenon, offers a unique perspective into the symmetry and exotic topological properties of quantum materials, enabling new avenues for optoelectronic devices. We uncovered that the NLHE in a 3D topological insulator Bi2Te3, primarily attributed to skew scattering, is significantly influenced by its intrinsic topological surface state (TSS). We demonstrate room-temperature microwave rectification spanning from 0.01 to 16 GHz in 30 nm films and bulk crystals.