Study observes a room-temperature nonlinear Hall effect in elemental bismuth thin films

https://techxplore.com/news/2024-02-room-temperature-nonlinear-hall-effect.html

"bismuth thin film surfaces enable quantum nonlinear Hall effect voltages without any magnetism, in controlled fashion, converts THz to direct current... simple, environmentally friendly, on substrates suitable for micro- and flexible electronics... polycrystalline Bi thin films generate high efficiency THz third-harmonic reaching levels >1% at room temperature, surpasses Bi2Se3 benchmark... optoelectronic quantum-enhanced wireless high- frequency communication at room temperature"