Broadband Quantum Rectification and Mixing Via the Nonlinear Transport in PtTe ₂

The rapid growth of Internet of Things, 6G communication, and millimeter wave systems demands broadband rectifiers and mixers. The nonlinear Hall effect (NLHE) provides a junction-free route for broadband signal processing, overcoming high-frequency limitations associated with threshold voltages and junction capacitance in conventional semiconductor technologies. However, few NLHE material platforms combine strong nonlinearity, high conductivity, and compatibility with wafer-scale processing. In this work, we demonstrate NLHE in PtTe 2 thin films with a second-order conductivity of 0.005 Ω –1 V –1 and a DC conductivity of 9.5 × 10 5 S/m at room temperature. The films enable bias-free rectification from 0.62 to 2.88 THz and frequency mixing from 0.1 to 40 GHz, including wireless mixing in the GHz regime. The passive mixer exhibits a 1 dB compression point of 8 dBm. These results establish PtTe 2 as a wafer-scale platform for high-frequency signal processing, highlighting the practical potential of NLHE for next-generation communication and electronic technologies.