Atomically sculptured heart in oxide film using convergent electron beam

We demonstrate a fabrication of an atomically controlled single-crystal heart-shaped nanostructure using a convergent electron beam in a scanning transmission electron microscope. The delicately controlled e-beam enable epitaxial crystallization of perovskite oxide LaAlO 3 grown out of the relative conductive interface (i.e. 2 dimensional electron gas) between amorphous LaAlO 3 /crystalline SrTiO 3 .