Voltage-driven magnetization switching and spin pumping in Weyl semimetals

Abstract

We demonstrate electrical magnetization switching and spin pumping in magnetically doped Weyl semimetals. The Weyl semimetal is a new class of topological semimetals, 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 whilst 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 more energetically efficient for us in spintronics devices compared to conventional spin transfer torque switching.

5 pages, 4 figures

References in corpus (6)

• Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
• Spin Transfer Torques
• Experimental discovery of Weyl semimetal TaAs
• Topological response in Weyl semimetals and the chiral anomaly
• A new type of Weyl semimetal with quadratic double Weyl fermions in SrSi2
• Charge-Induced Spin Torque in Anomalous Hall Ferromagnets

Cited by in corpus (17)

• Giant anomalous Hall effect in a ferromagnetic Kagome-lattice semimetal
• Quantum transport evidence of Weyl fermions in an epitaxial ferromagnetic oxide
• Magnetic textures and dynamics in magnetic Weyl semimetals
• Ferromagnetic Weyl Fermions in Two-Dimensional Layered Electride Gd${}_2$C
• Spin and spin current -- From fundamentals to recent progress
• Two-orbital effective model for magnetic Weyl semimetal in Kagome-lattice shandite
• Tuning the nontrivial topological properties of the Weyl semimetal CeAlSi
• Topological features in the ferromagnetic Weyl semimetal CeAlSi: Role of domain walls
• Towards the manipulation of topological states of matter: A perspective from electron transport
• Ferromagnetic state above room temperature in a proximitized topological Dirac semimetal
• Intrinsic insulating transport characteristics in low-carrier density EuCd2As2 films
• Intrinsic torques emerging from anomalous velocity in magnetic textures
• Berry curvature derived negative magnetoconductivity observed in type-II magnetic Weyl semimetal films
• Ultra-low-current-density single-layer magnetic Weyl semimetal spin Hall nano-oscillators
• Gate-Tunable Spin-to-Charge Conversion in Topological Insulator-Magnetic Insulator Heterostructures at Room Temperature
• Nonreciprocal ballistic transport in multi-layer Weyl semimetal films with surface engineering
• Microscopic theory of electrically induced spin torques in magnetic Weyl semimetals