Browsing by Author "Mebrahtu, H"

Now showing items 1-3 of 3

    • Pb-Graphene-Pb josephson junctions: Characterization in magnetic field 

      Borzenets, IV; Coskun, UC; Mebrahtu, H; Finkelstein, G (IEEE Transactions on Applied Superconductivity, 2012-06-14)
      We fabricate superconductor-graphene-superconductor Josephson junctions with superconducting regions made of lead (Pb). The critical current through graphene may be modulated by the external magnetic field; the resulting ...

    • Two-stage Kondo effect and Kondo-box level spectroscopy in a carbon nanotube 

      Bomze, Y; Borzenets, I; Mebrahtu, H; Makarovski, A; Baranger, HU; Finkelstein, G (Physical Review B - Condensed Matter and Materials Physics, 2010-10-18)
      The concept of the "Kondo box" describes a single spin, antiferromagnetically coupled to a quantum dot with a finite level spacing. Here, a Kondo box is formed in a carbon nanotube interacting with a localized electron. ...

    • Universal Nonequilibrium I-V Curve at an Interacting Impurity Quantum Critical Point 

      Zhang, G; Chung, C-H; Ke, CT; Lin, C-Y; Mebrahtu, H; Smirnov, AI; Finkelstein, G; ... (8 authors) (arXiv, 2016-09)
      The nonlinear I-V curve at an interacting quantum critical point (QCP) is typically out of reach theoretically. Here, however, we provide an analytical calculation of the I-V curve at a QCP under nonequilibrium conditions ...