Spin pumping in superconductor-antiferromagnetic insulator bilayers

Eirik Holm Fyhn and Jacob Linder
Phys. Rev. B 103, 134508 – Published 9 April 2021

Abstract

We study theoretically spin pumping in bilayers consisting of superconductors (SC) and antiferromagnetic insulators (AFI). We consider both compensated and uncompensated interfaces and include both the regular scattering channel and the Umklapp scattering channel. We find that at temperatures close to the critical temperatures and precession frequencies much lower than the gap, the spin current is enhanced in superconductors as compared to normal metals. Otherwise, the spin current is suppressed. The relevant precession frequencies, where the spin current in SC/AFI is enhanced compared to normal metals/AFI, is much lower than the typical resonance frequencies of antiferromagnets, which makes the detection of this effect experimentally challenging. A possible solution lies in the shifting of the resonance frequency by a static magnetic field.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 16 February 2021
  • Revised 27 March 2021
  • Accepted 30 March 2021

DOI:https://doi.org/10.1103/PhysRevB.103.134508

©2021 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Eirik Holm Fyhn and Jacob Linder

  • Center for Quantum Spintronics, Department of Physics, Norwegian, University of Science and Technology, NO-7491 Trondheim, Norway

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 103, Iss. 13 — 1 April 2021

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 B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×