Two-dimensional superconductivity and anisotropic transport at potassium tantalate interfaces

Unique electronic structures found at materials interfaces can allow unconventional quantum states to emerge. In a new report on Science, Changjiang Liu and a research team at the Argonne National Laboratory, University of Illinois and the Chinese Academy of Sciences detailed the discovery of superconductivity in electron gases formed at the interfaces between potassium tantalate (KTaO3) and insulating overlayers of either Europium-II oxide (EUO) or lanthanum aluminate (LaAlO3). The superconduct...