Magnetic domain structure and domain wall bound states of topological semimetal EuB6

Abstract

Electrically manipulating domain wall (DW) is at central in the field of spintronics. Magnetic Weyl semimetal (WSM) offers an additional knob for electric manipulation of DW by utilizing the topological DW bound states. Using magnetic WSM material EuB6 as a prototype system, we investigate its DW bound states combining first principles calculations and domain imaging via magnetic force microscopy (MFM). The MFM measurements reveal that domains with magnetization aligned along three [100] directions dominate over others under a small magnetic field along [001] direction. Accordingly, first principles calculations are performed based on experimentally determined DW type, which show a robust DW bound state featuring a spectral distribution over a large portion of the DW Brillouin zone. Such DW bound states should result in significant amount of localized charges which can be used to drive DW motion via the electrostatic forces exerted on the localized DW charges.

arXiv comment4 figures

References in corpus (21)

• Spintronics: Fundamentals and applications
• Spin torque switching with the giant spin Hall effect of tantalum
• Spintronics and Pseudospintronics in Graphene and Topological Insulators
• Magnetic Weyl Semimetal Phase in a Kagome Crystal
• 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
• Microscopic approach to current-driven domain wall dynamics
• Antiferromagnetic domain wall motion driven by spin-orbit torques
• Anomalous Hall effect and topological defects in antiferromagnetic Weyl semimetals: Mn${}_3$Sn/Ge
• Inhomogeneous Weyl and Dirac semimetals: Transport in axial magnetic fields and Fermi arc surface states from pseudo Landau levels
• Magnetic semimetals and quantized anomalous Hall effect in EuB6
• Spin-transfer torques for domain walls in antiferromagnetically coupled ferrimagnets
• Observation of perfect Andreev reflection due to Klein paradox in a topological superconducting state
• Universal charge and current on magnetic domain walls in Weyl semimetals
• Magnetic phase separation in EuB6 detected by muon spin rotation
• Magnetically-driven electronic phase separation in the semimetallic ferromagnet EuB${}_6$
• Time-reversal symmetry breaking driven topological phase transition in EuB${}_6$
• Lattice strain accompanying the colossal magnetoresistance effect in EuB${}_6$
• Electric manipulation of domain walls in magnetic Weyl semimetals via the axial anomaly
• Possible quantum nematic in a colossal magnetoresistance material
• Magneto-optical imaging of stepwise magnetic domain disintegration at characteristic temperatures in EuB_6