MgB 2 tunnel junctions (MgB 2/barrier/MgB 2) were fabricated using a native oxide grown on the bottom MgB 2 film as the tunnel barrier. Such barriers therefore survive the deposition of the second electrode at 300°C, even over junction areas of ∼1 mm 2. Studies of such junctions and those of the type MgB 2/native or thermal oxide/metal (Pb, Au, or Ag) show that tunnel barriers grown on MgB 2 exhibit a wide range of barrier heights and widths.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)