Phys. Rev. Lett. 101, 107001 (2008) [4 pages]Anomalous Josephson Current in Junctions with Spin Polarizing Quantum Point ContactsReceived 7 May 2008; published 2 September 2008 We consider a ballistic Josephson junction with a quantum point contact in a two-dimensional electron gas with Rashba spin-orbit coupling. The point contact acts as a spin filter when embedded in a circuit with normal electrodes. We show that with an in-plane external magnetic field an anomalous supercurrent appears even for zero phase difference between the superconducting electrodes. In addition, the external field induces large critical current asymmetries between the two flow directions, leading to supercurrent rectifying effects. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.107001
DOI:
10.1103/PhysRevLett.101.107001
PACS:
74.45.+c, 71.70.Ej, 72.25.Dc, 74.50.+r
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