Superconducting LaAlO3/SrTiO3 Nanowires
  We report superconductivity in quasi-1D nanostructures created at the LaAlO3/SrTiO3 interface. Nanostructures having line widths w~10 nm are formed from the parent two-dimensional electron liquid using conductive atomic force microscope lithography. Nanowire cross-sections are small compared to the superconducting coherence length in LaAlO3/SrTiO3 (w<<xi~100 nm), placing them in the quasi-1D regime. Broad superconducting transitions with temperature and finite resistances in the superconducting state well below Tc~200 mK are observed. V-I curves show switching between the superconducting and normal states that are characteristic of superconducting nanowires. The four-terminal resistance in the superconducting state shows an unusual dependence on the current path, varying by as much as an order of magnitude. 
Joshua P. Veazey, Guanglei Cheng, Patrick Irvin, Cheng Cen, Daniela F.   Bogorin, Feng Bi, Mengchen Huang, Chung-Wung Bark, ...
cond-mat.mes-hall cond-mat.mtrl-sci cond-mat.supr-con