Condensed Matter Seminar Series
Oxide Nanoelectronics On Demand
Jeremy Levy
University of Pittsburgh
Tuesday November
10, 11:00 am,
Room 298, Physics Building
Electronic confinement at
nanoscale dimensions remains a central means of science and
technology. In this talk, I will describe a new method for
producing extreme nanoscale electronic confinement at the interface
between two separately insulating oxides, LaAlO3 and SrTiO3. Using an
approach reminiscent of the popular toy "Etch-a-Sketch", we scan an
electrically biased probe on the surface of this heterostructure to
create nanoscale conducting islands, nanowires, tunnel junctions and
field-effect transistors at the interface. The smallest feature
size approaches one nanometer. These structures are created in
ambient conditions at room temperature, and can be erased and rewritten
repeatedly. At low temperatures, a variety of quantum phases have
been observed, including integer and fractional quantum Hall states and
superconductivity. This new, on-demand nanoelectronics platform
has the potential for widespread scientific and technological
exploitation.
This work is supported by the National Science Foundation, Defense
Advanced Research Projects Agency, Army Research Office and Air Force
Office of Scientific Research.
Host: Gleb Finkelstein