Guoyi Shi

Jul 24, 2024 | nature.com | Guoyi Shi |Hui Tan |Chenhui Zhang |Anjan Soumyanarayanan |Mehrdad Elyasi

AbstractSpin-wave excitations of magnetic moments (or magnons) can transport spin angular momentum in insulating magnetic materials. This property distinguishes magnonic devices from traditional electronics, where power consumption results from electrons’ movement. Recently, magnon torques have been used to switch perpendicular magnetization in the presence of an external magnetic field.

Jan 19, 2024 | nature.com | Guoyi Shi |Kyoung-Whan Kim |Hui Tan |Ming Lin |Yakun Liu |Anjan Soumyanarayanan | +1 more

AbstractThe key challenge of spin–orbit torque applications lies in exploring an excellent spin source capable of generating out-of-plane spins while exhibiting high spin Hall conductivity. Here we combine PtTe2 for high spin conductivity and WTe2 for low crystal symmetry to satisfy the above requirements.

Mar 13, 2023 | link.aps.org | Engineering Programme |Fei Wang |Hui Tan |Guoyi Shi

Abstract Electron-mediated spin torque provides a fast and efficient method to manipulate magnetization; however, electron motion inevitably brings about the generation of Joule heat and corresponding power consumption. Magnon-mediated spin torque, without involving moving electrons, could circumvent the energy dissipation issue. In this work, we fabricate a sandwich structure of topological insulator/antiferromagnetic insulator/ferromagnet with perpendicular magnetic anisotropy.