Electric manipulation of domain walls in magnetic Weyl semimetals via the axial anomaly
arXiv:2012.12785 · doi:10.21468/SciPostPhys.10.5.102
Abstract
We show how the axial (chiral) anomaly induces a spin torque on the magnetization in magnetic Weyl semimetals. The anomaly produces an imbalance in left- and right-handed chirality carriers when non-orthogonal electric and magnetic fields are applied. Such imbalance generates a spin density which exerts a torque on the magnetization, the strength of which can be controlled by the intensity of the applied electric field. We show how this results in an electric control of the chirality of domain walls, as well as in an improvement of the domain wall dynamics, by delaying the onset of the Walker breakdown. The measurement of the electric field mediated changes in the domain wall chirality would constitute a direct proof of the axial anomaly. Additionally, we show how quantum fluctuations of electronic Fermi arc states bound to the domain wall naturally induce an effective magnetic anisotropy, allowing for high domain wall velocities even if the intrinsic anisotropy of the magnetic Weyl semimetal is small.
arXiv comment12 pages, 4 figures
References in corpus (39)
- Weyl and Dirac Semimetals in Three Dimensional Solids
- The Chiral Magnetic Effect
- Current-driven dynamics of chiral ferromagnetic domain walls
- Dynamics of Dzyaloshinskii domain walls in ultrathin magnetic films
- Theory of Current-Driven Domain Wall Motion: A Poorman's Approach
- Magnetic Weyl Semimetal Phase in a Kagome Crystal
- Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2
- Evidence for Magnetic Weyl Fermions in a Correlated Metal
- Topological Hall effect and Berry phase in magnetic nanostructures
- Radiatively Induced Lorentz and CPT Violation in Electrodynamics
- Inverse Spin-Galvanic Effect in a Topological-Insulator/Ferromagnet Interface
- Anomalous Axion Interactions and Topological Currents in Dense Matter
- Axionic field theory of (3+1)-dimensional Weyl semi-metals
- Consequences of a condensed matter realization of Lorentz violating QED in Weyl semi-metals
- Notes on Anomaly Induced Transport
- Exact calculation of the radiatively-induced Lorentz and CPT violation in QED
- Topological Magnetic Phase in the Candidate Weyl Semimetal CeAlGe
- Electric charging of magnetic textures on the surface of a topological insulator
- Thin-Film Magnetization Dynamics on the Surface of a Topological Insulator
- Switching the magnetic configuration of a spin valve by current induced domain wall motion
- Magnetism and anomalous transport in the Weyl semimetal PrAlGe: Possible route to axial gauge fields
- Gauge Invariance and the Pauli-Villars Regulator in Lorentz- and CPT-Violating Electrodynamics
- Failure of Gauge Invariance in the Nonperturbative Formulation of Massless Lorentz-Violating QED
- Response of strongly-interacting matter to magnetic field: some exact results
- Magnetic textures and dynamics in magnetic Weyl semimetals
- Chirality-dependent transmission of spin waves through domain walls
- Universal charge and current on magnetic domain walls in Weyl semimetals
- Theory for spin torque in Weyl semimetal with magnetic texture
- Improved Domain Wall Dynamics and Magnonic Torques using Topological Insulators
- Spin-to-charge conversion in magnetic Weyl semimetals
- Domain Wall Motion in Thin-Film Magnets/ Topological Insulator Junctions
- Fluctuation-induced magnetization dynamics and criticality at the interface of a topological insulator with a magnetically ordered layer
- Localized charge in various configurations of magnetic domain wall in Weyl semimetal
- Weyl fermions induced Magnon electrodynamics in Weyl semimetal
- Dirac electrons and domain walls: a realization in junctions of ferromagnets and topological insulators
- Axial anomaly generation by domain wall motion in Weyl semimetals
- Unconventional electromagnetic mode in neutral Weyl Semimetals
- Magnetic dynamics with Weyl fermions
- Electrically-driven domain wall motion in a ferromagnetic Kagome lattice
Cited by in corpus (9)
- Lorentz violation in Dirac and Weyl semimetals
- Emergent Chern-Simons Interactions in 3+1 Dimensions
- Pseudo-gauge Fields in Dirac and Weyl Materials
- Nonlinear chiral photocurrent in parity-violating magnetic Weyl semimetals
- Chiral gauge field in fully-spin polarized Weyl semimetal with magnetic domain walls
- Directional field-dependence of tunable magnetic domains in noncentrosymmetric ferromagnetic Weyl semimetal CeAlSi
- Probing domain wall dynamics in magnetic Weyl semimetals via the non-linear anomalous Hall effect
- Spin motive force by the momentum-space Berry phase in magnetic Weyl semimetals
- Magnetic domain structure and domain wall bound states of topological semimetal EuB6