Spin-orbit torques in topological insulator / two-dimensional ferromagnet heterostructures

Thomas Guillet; Giulio Gentille; Regina Galceran; Juan F. Sierra; Marius Costache; Matthieu Jamet; Frédéric Bonell; Sergio O. Valenzuela

doi:10.1117/12.2604383

3 August 2021 Spin-orbit torques in topological insulator / two-dimensional ferromagnet heterostructures

Thomas Guillet, Giulio Gentille, Regina Galceran, Juan F. Sierra, Marius Costache, Matthieu Jamet, Frédéric Bonell, Sergio O. Valenzuela

Author Affiliations +

Proceedings Volume 11805, Spintronics XIV; 1180525 (2021) https://doi.org/10.1117/12.2604383
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States

Abstract

Topological insulators (TI) have gained much interest in the field of spintronics for the generation of pure spin currents. Indeed, three-dimensional TIs are predicted to host exotic properties like topologically protected surface states (TSS), which show Dirac-like band dispersion and spin-momentum locking [1]. One of the main strategies is to take advantages of the spin polarization of the TSSs to manipulate the magnetization of an adjacent ferromagnetic thin film (FM) using the spin-orbit torque (SOT) mechanism [2]. In the past few years, the community attempted to replace the traditional heavy metals by a TI in order to enhance the SOT efficiency with limited success. It now appears that the interface sharpness and the high chemical affinity between Bi-based TIs and classical 3d FMs is a major hurdle to reach the predicted breakthrough in magnetization switching power-efficiency [3]. The emergence of ferromagnetism in two dimensions in 2017, which started a new field in condensed matter physics, could bring a solution to this issue.The van der Waals (vdW) nature of the interaction between the TI and the 2D-FM should limit chemical reactions, interface intermixing and hybridization of state between the two layers.

Conference Presentation

Citation Download Citation

Thomas Guillet, Giulio Gentille, Regina Galceran, Juan F. Sierra, Marius Costache, Matthieu Jamet, Frédéric Bonell, and Sergio O. Valenzuela "Spin-orbit torques in topological insulator / two-dimensional ferromagnet heterostructures", Proc. SPIE 11805, Spintronics XIV, 1180525 (3 August 2021); https://doi.org/10.1117/12.2604383

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available