Fig. 1: Structure of the STO/GaN HEMTs.

a Schematic illustration, b photograph, c optical microscopy image and d energy band diagram of fabricated AlGaN/GaN high-electron-mobility transistors (HEMT) with SrTiO3 (STO) gate dielectric.

a Schematic illustration, b photograph, c optical microscopy image and d energy band diagram of fabricated AlGaN/GaN high-electron-mobility transistors (HEMT) with SrTiO3 (STO) gate dielectric.