Diodes with breakdown voltages enhanced by the metal-insulator transition of LaAlO3–SrTiO3 interfaces

Using the metal-insulator transition that takes place as a function of carrier density at the LaAlO3–SrTiO3 interface, oxide diodes have been fabricated with room-temperature breakdown voltages of up to 200 V. With applied voltage, the capacitance of the diodes changes by a factor of 150. The diodes are robust and operate at temperatures up to 270 C.