Geometric π Josephson junction in d-wave superconducting thin films
Abstract
A novel way to realize a π Josephson junction is proposed, based on a weak link in an unconventional d-wave superconductor with appropriately chosen boundary geometry. The critical current of such a junction is calculated from a fully self-consistent solution of microscopic Eilenberger theory of superconductivity. The results clearly show that a transition to a π Josephson junction occurs for both low temperatures and small sizes of the geometry.
- Publication:
-
Applied Physics Letters
- Pub Date:
- November 2007
- DOI:
- arXiv:
- arXiv:0708.3898
- Bibcode:
- 2007ApPhL..91s2502G
- Keywords:
-
- 74.50.+r;
- 74.78.-w;
- 74.20.Rp;
- 74.25.Sv;
- 85.25.Cp;
- 85.25.Am;
- Tunneling phenomena;
- point contacts weak links Josephson effects;
- Superconducting films and low-dimensional structures;
- Pairing symmetries;
- Critical currents;
- Josephson devices;
- Superconducting device characterization design and modeling;
- Condensed Matter - Superconductivity
- E-Print:
- 3 pages, 3 figures