Current-induced torques in magnetic Weyl semimetal tunnel junctions
arXiv:2103.05512 · doi:10.1103/PhysRevB.103.L241103
Abstract
We study the current-induced torques in asymmetric magnetic tunnel junctions containing a conventional ferromagnet and a magnetic Weyl semimetal contact. The Weyl semimetal hosts chiral bulk states and topologically protected Fermi arc surface states which were found to govern the voltage behavior and efficiency of current-induced torques. We report how bulk chirality dictates the sign of the non-equilibrium torques acting on the ferromagnet and discuss the existence of large field-like torques acting on the magnetic Weyl semimetal which exceeds the theoretical maximum of conventional magnetic tunnel junctions. The latter are derived from the Fermi arc spin texture and display a counter-intuitive dependence on the Weyl nodes separation. Our results shed light on the new physics of multilayered spintronic devices comprising of magnetic Weyl semimetals, which might open doors for new energy efficient spintronic devices.
arXiv comment5 Pages, 4 Figures
References in corpus (20)
- Weyl and Dirac Semimetals in Three Dimensional Solids
- Giant anomalous Hall effect in a ferromagnetic Kagome-lattice semimetal
- Magnetic Weyl Semimetal Phase in a Kagome Crystal
- Anatomy of Spin-Transfer Torque
- Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2
- Discovery of topological Weyl fermion lines and drumhead surface states in a room temperature magnet
- Electromagnetic Response of Weyl Semimetals
- High-throughput calculations of magnetic topological materials
- Weyl Semimetals, Fermi Arcs and Chiral Anomalies (A Short Review)
- Chiral anomaly and transport in Weyl metals
- Chiral Anomaly and Diffusive Magnetotransport in Weyl Metals
- Anomalous Bias Dependence of Spin Torque in Magnetic Tunnel Junctions
- Topological surface states and Fermi arcs of the noncentrosymmetric Weyl semimetals TaAs, TaP, NbAs, and NbP
- Current-induced torques in the presence of spin-orbit coupling
- Chiral magnetic effect in two-band lattice model of Weyl semimetal
- Magnetization switching induced by spin-orbit torque from Co2MnGa magnetic Weyl semimetal thin films
- Theory for spin torque in Weyl semimetal with magnetic texture
- Dynamic chiral magnetic effect and anisotropic natural optical activity of tilted Weyl semimetals
- Pushing the limit of quantum transport simulations
- Bidirectional switching assisted by interlayer exchange coupling in asymmetric magnetic tunnel junctions