- Physical Review Journals
All JournalsPhysics Magazine

Physical Review B

Export citation

Export citation

Choose format for download:

Download Citation
  • Letter

Gigantic tunneling magnetoresistance in magnetic Weyl semimetal tunnel junctions

D. J. P. de Sousa1,*, C. O. Ascencio2,†, P. M. Haney3, J. P. Wang1, and Tony Low1,‡

  • 1Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, Minnesota 55455, USA
  • 2School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
  • 3Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6202, USA

  • *sousa020@umn.edu
  • †ascen009@umn.edu
  • ‡tlow@umn.edu
PDF

Phys. Rev. B 104, L041401 – Published 1 July, 2021

DOI: https://doi.org/10.1103/PhysRevB.104.L041401

Abstract

We investigate the tunneling magnetoresistance in magnetic tunnel junctions (MTJs) comprised of Weyl semimetal contacts. We show that chirality-magnetization locking leads to a gigantic tunneling magnetoresistance ratio, an effect that does not rely on spin filtering by the tunnel barrier. Our results indicate that the conductance in the antiparallel configuration is more sensitive to magnetization fluctations than in MTJs with normal ferromagnets, and predicts a TMR as large as 104 % when realistic magnetization fluctuations are accounted for. In addition, we show that the Fermi arc states give rise to a non-monotonic dependence of conductance on the misalignment angle between the magnetizations of the two contacts.

View figure in article

Physics Subject Headings (PhySH)

Authorization Required

We need you to provide your credentials before accessing this content.
Article Available via CHORUS
Download Accepted Manuscript

Other Options

Supplemental Material (Subscription Required)

References (Subscription Required)

Outline

Information

Phys. Rev. B 104, L041401– Published 1 July, 2021
  • Received 6 March 2021
  • Accepted 21 June 2021
Crossmark - Check for updates button

©2021 American Physical Society

Sign In to Your Journals Account

Filter

Filter

Article Lookup

Enter a citation