nanostructures*

The 2D electron gas at the LaAlO₃/SrTiO₃ interface can be patterned using conductive atomic force microscope (c-AFM) lithography [1], which has been used to create quantum dots and single electron transistors [2]. We aim to use this technique to create an on-demand single-electron source by sketching a linear array of quantum dots and applying out-of-phase excitation across the dot array. We will discuss both double-dot and triple-dot devices and their associated electron tunneling phenomenon and issues related to the the individual tunabilities of the dots.
[1] Cen et al, Nature Mater. 7, 298 (2008).
[2] Cheng et al, Nature Nanotechnology 6, 343 (2011).