Sharp superconductor-insulator transition in short wires.
Recent experiments on short MoGe nanowires show a sharp superconducting-insulating transition at the universal resistance R(Q)=h/(4e(2)), contrary to the expectation of a smooth temperature dependence of the resistance for such Josephson-like systems. We present a self-consistent renormalization-group treatment of interacting quantum phase slips in short superconducting wires, which reproduces this sharp universal transition. Our method should also apply to other systems in the sine-Gordon universality class, in the previously inaccessible intermediate-coupling regime.
Meidan
Dganit
D
Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, 76100, Israel.
Oreg
Yuval
Y
Refael
Gil
G