Spin motive force by the momentum-space Berry phase in magnetic Weyl semimetals

Abstract

We show that the magnetic precession of ferromagnetic moments in a noncentrosymmetric magnetic Weyl semimetal induces an electric current through a mechanism analogous to the adiabatic charge pumping. The current is a consequence of a Berry phase in the momentum space resulting from the circular motion of Weyl nodes induced by the precession. This mechanism resembles the Faraday effect, namely, induced magnetic field by circular electric current. The circular motion of Weyl nodes induces magnetic charge current in the momentum space, which results in a Berry phase that describes the adiabatic pump. Experimentally, this phenomenon is similar to spin motive force, which is an electric current induced by magnetic precision in the presence of the spatial gradient of magnetization. However, unlike the conventional spin motive force, this current occurs without a magnetization gradient. The result demonstrates a nontrivial interplay between the topological electronic state and magnetic dynamics.

6 pages, 1 figures

References in corpus (14)

• Topological Field Theory of Time-Reversal Invariant Insulators
• Phase transition between the quantum spin Hall and insulator phases in 3D: emergence of a topological gapless phase
• Magnetic Weyl Semimetal Phase in a Kagome Crystal
• Trajectory of Anomalous Hall Effect toward the Quantized State in a Ferromagnetic Topological Insulator
• Scale-Invariant Dissipationless Chiral Transport in Magnetic Topological Insulators beyond the Two-Dimensional Limit
• Discovery of topological Weyl fermion lines and drumhead surface states in a room temperature magnet
• Photocurrents in Weyl semimetals
• A new noncollinear ferromagnetic Weyl semimetal with anisotropic anomalous Hall effect
• Observation of Weyl fermions in a magnetic non-centrosymmetric crystal
• Emergent Electromagnetic Induction and Adiabatic Charge Pumping in Weyl Semimetals
• Transition from Intrinsic to Extrinsic Anomalous Hall Effect in the Ferromagnetic Weyl Semimetal PrAlGe${}_{1-x}$Si${}_x$
• Resonant photovoltaic effect in doped magnetic semiconductors
• Axial anomaly generation by domain wall motion in Weyl semimetals
• Electric manipulation of domain walls in magnetic Weyl semimetals via the axial anomaly

Cited by in corpus (1)

• Chiral gauge field in fully-spin polarized Weyl semimetal with magnetic domain walls