Critical current 0-π transition in designed josephson quantum dot junctions

TY - JOUR

T1 - Critical current 0-π transition in designed josephson quantum dot junctions

AU - Jørgensen, H. Ingerslev

AU - Novotný, T.

AU - Grove-Rasmussen, K.

AU - Flensberg, K.

AU - Lindelof, P. E.

PY - 2007/8/1

Y1 - 2007/8/1

N2 - We report on quantum dot based josephson junctions designed specifically for measuring the supercurrent. From high-accuracy fitting of the current-voltage characteristics, we determine the full magnitude of the supercurrent (critical current). Strong gate modulation of the critical current is observed through several consecutive Coulomb blockade oscillations. The critical current crosses zero close to, but not at, resonance due to the so-called 0-π transition in agreement with a simple theoretical model.

AB - We report on quantum dot based josephson junctions designed specifically for measuring the supercurrent. From high-accuracy fitting of the current-voltage characteristics, we determine the full magnitude of the supercurrent (critical current). Strong gate modulation of the critical current is observed through several consecutive Coulomb blockade oscillations. The critical current crosses zero close to, but not at, resonance due to the so-called 0-π transition in agreement with a simple theoretical model.

U2 - 10.1021/nl071152w

DO - 10.1021/nl071152w

M3 - Journal article

C2 - 17637018

AN - SCOPUS:34548164874

SN - 1530-6984

VL - 7

SP - 2441

EP - 2445

JO - Nano Letters

JF - Nano Letters

IS - 8

ER -