Proximity Effect and Its Enhancement by Ferromagnetism in High-Temperature Superconductor-Ferromagnet Structures

A. F. Volkov and K. B. Efetov
Phys. Rev. Lett. 102, 077002 – Published 20 February 2009

Abstract

We consider a bilayer consisting of a d-wave layered superconductor and diffusive ferromagnet with a domain wall (DW). The c axis in the superconductor and DW in the ferromagnet are assumed to be perpendicular to the interface. We demonstrate that in such a heterostructure the inhomogeneous exchange field enhances the proximity effect. It is shown that, whereas in the absence of the exchange field the d-wave condensate decays in the normal metal on the mean free path l, the superconductivity penetrates the ferromagnet along the DW over much larger distances. This happens because the presence of the DW results in a generation of an odd-frequency triplet s-wave component of the condensate. The phenomenon discovered here may help to explain a recent experiment on high-temperature superconductor-ferromagnet bilayers.

  • Figure
  • Figure
  • Received 5 August 2008

DOI:https://doi.org/10.1103/PhysRevLett.102.077002

©2009 American Physical Society

Authors & Affiliations

A. F. Volkov1,2 and K. B. Efetov3

  • 1Theoretische Physik III, Ruhr-Universität Bochum, D-44780 Bochum, Germany
  • 2Institute for Radioengineering and Electronics of Russian Academy of Sciences, 11-7 Mokhovaya Street, Moscow 125009, Russia
  • 3L. D. Landau Institute for Theoretical Physics RAS, 119334 Moscow, Russia

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 102, Iss. 7 — 20 February 2009

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
×