Voltage-Driven Magnetization Switching and Spin Pumping in Weyl Semimetals

Daichi Kurebayashi, Kentaro Nomura

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

We demonstrate electrical magnetization switching and spin pumping in magnetically doped Weyl semimetals. The Weyl semimetal is a three-dimensional gapless topological material, known to have nontrivial coupling between the charge and the magnetization due to the chiral anomaly. By solving the Landau-Lifshitz-Gilbert equation for a multilayer structure of a Weyl semimetal, an insulator and a metal while taking the charge-magnetization coupling into account, magnetization dynamics is analyzed. It is shown that the magnetization dynamics can be driven by the electric voltage. Consequently, switching of the magnetization with a pulsed electric voltage can be achieved, as well as precession motion with an applied oscillating electric voltage. The effect requires only a short voltage pulse and may therefore be energetically favorable for us in spintronics devices compared to conventional spin-transfer torque switching.

Original languageEnglish
Article number044013
JournalPhysical Review Applied
Volume6
Issue number4
DOIs
Publication statusPublished - 2016 Oct 24

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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