Non-Local Supercurrent in a Three-Terminal Josephson junction


  Yuval Ronen  ,  Yonatan Cohen [1]  ,  Jung-Hyun Kang [1]  ,  Moty Heiblum [1]  ,  Denis Feinberg [2]  ,  Régis Mélin [2]  ,  Diana Mahalu [1]  ,  Hadas Shtrikman [1]  
[1] Braun Center for Submicron Research, Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel
[2] Institute NEEL, CNRS and Université Joseph Fourier, UPR 2940, Boîte Postale 166, F-38042 Grenoble Cedex 9, France

We report observation of a new non-dissipative, nonlocal, Josephson current, which is carried by an Andreev bound state (ABS) that connects three superconducting terminals. Sensitive cross-correlation measurements of current fluctuations prove the origin of the effect and point to its non-local characteristics. An interference measurement in a bi-Squid device, demonstrates that the Josephson current results by a coherent process. In addition, a rich subharmonic gap structure, which arises from non-local multiple crossed Andreev reflection processes, is observed.