Odd Triplet Pairing in Clean Superconductor/Ferromagnet Heterostructures

Klaus Halterman, Paul H. Barsic, and Oriol T. Valls
Phys. Rev. Lett. 99, 127002 – Published 17 September 2007

Abstract

We study triplet pairing correlations in clean ferromagnet (F)/superconductor (S) nanojunctions, via fully self-consistent solution of the Bogoliubov–de Gennes equations. We consider FSF trilayers, with S being an s-wave superconductor, and an arbitrary angle α between the magnetizations of the two F layers. We find that contrary to some previous expectations, triplet correlations, odd in time, are induced in both the S and F layers in the clean limit. We investigate their behavior as a function of time, position, and α. The triplet amplitudes are largest at times on the order of the inverse Debye frequency, and at that time scale they are long-ranged in both S and F. The zero temperature condensation energy is found to be lowest when the magnetizations are antiparallel.

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  • Received 4 April 2007

DOI:https://doi.org/10.1103/PhysRevLett.99.127002

©2007 American Physical Society

Authors & Affiliations

Klaus Halterman1,*, Paul H. Barsic2,†, and Oriol T. Valls2,‡

  • 1Physics and Computational Sciences, Research and Engineering Sciences Department, Naval Air Warfare Center, China Lake, California 93555, USA
  • 2School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA

  • *klaus.halterman@navy.mil
  • barsic@physics.umn.edu
  • Also at Minnesota Supercomputer Institute, University of Minnesota, Minneapolis, MN 55455, USA. otvalls@umn.edu

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Issue

Vol. 99, Iss. 12 — 21 September 2007

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