[14p-K302-1~14] 10.3 Spin devices, magnetic memories and storages

2:00 PM - 2:15 PM JST(5:00 AM - 5:15 AM UTC)

[14p-K302-3] Anisotropic spin-orbit torque unleashed by Fermi surface symmetry reduction

〇Satoshi Sugimoto¹, Yasufumi Araki², Jun'ichi Ieda², Shinya Kasai¹ (1.NIMS, 2.JAEA)

Keywords:

Topological insulator,Spin-orbit torque,Spintronics

The design of spin polarization is an essential agenda for further development of spin-orbit torque (SOT) applications. Typical polarization vectors lack the out-of-plane (OOP) and one of the in-plane (IP) components, leading to nondeterministic switching problems at type-z and type-x configurations. Unleashing these unconventional SOTs has principally required additional symmetry breaking for thin-film layered structures. Here, we introduce a new approach to induce huge OOP and IP SOTs for Bi₂Te₃/CoFeB heterostructures, relying on a unique symmetry reduction protocol of the Fermi surface.