Anomalous Josephson Current in Junctions with Spin Polarizing Quantum Point Contacts

A. A. Reynoso, Gonzalo Usaj, C. A. Balseiro, D. Feinberg, and M. Avignon
Phys. Rev. Lett. 101, 107001 – Published 2 September 2008

Abstract

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.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 7 May 2008

DOI:https://doi.org/10.1103/PhysRevLett.101.107001

©2008 American Physical Society

Authors & Affiliations

A. A. Reynoso1,2, Gonzalo Usaj1,2, C. A. Balseiro1,2, D. Feinberg3, and M. Avignon3

  • 1Instituto Balseiro, Centro Atómico Bariloche, Río Negro, Argentina
  • 2Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
  • 3Institut NEEL, CNRS and Université Joseph Fourier, Boite Postale 166, 38042 Grenoble, France

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 101, Iss. 10 — 5 September 2008

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×