Rewritable superconducting nanostructures at the LaAlO$_{3}$/ SrTiO$_{3}$ interface

We describe efforts to control the superconducting-insulator transition in LaAlO$_{3}$/ SrTiO$_{3}$ using a conducting AFM writing technique.\footnote{C. Cen, S. Thiel, K. E. Andersen, C. S. Hellberg, J. Mannhart, and J. Levy, Nature Materials \textbf{7}, 2136 (2008).}$^,$\footnote{C. Cen, S. Thiel, J. Mannhart, and J. Levy, Science \textbf{323}, 1026 (2009).} Low temperature superconductivity of nanowires created at the 2DEG has been observed, corresponding to carrier densities $\approx$ 5x10$^{13}$ cm$^{-2}$. The ability control superconductivity in this fashion paves the way for new classes of superconducting devices. Support from DAPRA Seedling (W911NF-09-10258) and ARO MURI (W911NF-08-1-0317) and NHMFL is gratefully acknowledged.