title: Oxide-based platform for reconfigurable superconducting nanoelectronics.
abstract: We report quasi-1D superconductivity at the interface of LaAlO3 and SrTiO3. The material system and nanostructure fabrication method supply a new platform for superconducting nanoelectronics. 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, placing them in the quasi-1D regime. Broad superconducting transitions versus temperature and finite resistances in the superconducting state well below Tc ≈ 200 mK are observed, suggesting the presence of fluctuation- and heating-induced resistance. The superconducting resistances and V-I characteristics are tunable through the use of a back gate. Four-terminal resistances in the superconducting state show an unusual dependence on the current path, varying by as much as an order of magnitude. This new technology, i.e., the ability to 'write' gate-tunable superconducting nanostructures on an insulating LaAlO3/SrTiO3 'canvas', opens possibilities for the development of new families of reconfigurable superconducting nanoelectronics.
authors: Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA.
authors: Joshua P
authors: JP
authors: Veazey
authors: Guanglei
authors: G
authors: Cheng
authors: Patrick
authors: P
authors: Irvin
authors: Cheng
authors: C
authors: Cen
authors: Daniela F
authors: DF
authors: Bogorin
authors: Feng
authors: F
authors: Bi
authors: Mengchen
authors: M
authors: Huang
authors: Chung-Wung
authors: CW
authors: Bark
authors: Sangwoo
authors: S
authors: Ryu
authors: Kwang-Hwan
authors: KH
authors: Cho
authors: Chang-Beom
authors: CB
authors: Eom
authors: Jeremy
authors: J
authors: Levy