Yanwu Xie

TL;DR: To better understand the interface conductivity, scanning superconducting quantum interference device microscopy is used to image the magnetic field locally generated by current in an interface and finds that the current flowed in conductive narrow paths oriented along the crystallographic axes, embedded in a less conductive background.

TL;DR: It is shown that the application of chemicals such as acetone, ethanol, and water can induce a large change in the conductivity, and, in particular, an insulator to metal transition around the critical LaAlO(3) thickness.

TL;DR: The ability to control materials properties through interface engineering is demonstrated by the appearance of conductivity at the interface of certain insulators, most famously the {001} interface of the band insulators LaAlO${3}$ and TiO$_{2}$-terminated SrTiO$³$ (STO) as discussed by the authors.

TL;DR: In this paper, the authors show that the mechanism of conductivity switching is the writing of surface charge on a wide range of LaAlO3 thicknesses, including bulk crystals.

TL;DR: A strong asymmetry with writing polarity was found for 1 and 2 unit cells of LaAlO(3), providing experimental evidence for a theoretically predicted built-in potential.