Topological Spin Texture in a Quantum Anomalous Hall Insulator

Abstract

The quantum anomalous Hall (QAH) effect has been recently discovered in experiment using thin-film topological insulator with ferromagnetic ordering and strong spin-orbit coupling. Here we investigate the spin degree of freedom of a QAH insulator and uncover a fundamental phenomenon that the edge states exhibit topologically stable spin texture in the boundary when a chiral-like symmetry is present. This result shows that edge states are chiral in both the orbital and spin degrees of freedom, and the chiral edge spin texture corresponds to the bulk topological states of the QAH insulator. We also study the potential applications of the edge spin texture in designing topological-state-based spin devices which might be applicable to future spintronic technologies.

5 pages manuscript, 8+ pages supplementary information, 8 figures; published version

References in corpus (11)

• Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• Classification of topological insulators and superconductors in three spatial dimensions
• Topological Field Theory of Time-Reversal Invariant Insulators
• Quantized Anomalous Hall Effect in Magnetic Topological Insulators
• Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
• Quantum Anomalous Hall Effect in Hg${}_{1-y}$Mn${}_y$Te Quantum Wells
• Surface quantized anomalous Hall current and magneto-electric effect in magnetically disordered topological insulators
• Effect of Induced Spin-Orbit Coupling for Atoms via Laser Fields
• Orbital analogue of quantum anomalous Hall effect in $p$-band systems
• Manipulating Topological Edge Spins in One-Dimensional Optical Lattice

Cited by in corpus (33)

• Topological Phases in Two-Dimensional Materials: A Brief Review
• Colloquium: Quantum anomalous Hall effect
• Two-Dimensional Room Temperature Ferromagnetic Semiconductors with Quantum Anomalous Hall Effect
• Prediction of High Temperature Quantum Anomalous Hall Effect in Two Dimensional Transition-Metal Oxides
• Dirac, Rashba and Weyl type spin-orbit couplings: toward experimental realization in ultracold atoms
• Electric field induced topological phase transition and large enhancements of spin-orbit coupling and Curie temperature in two-dimensional ferromagnetic semiconductors
• Prediction of Weyl semimetal, AFM topological insulator, nodal line semimetal, and Chern insulator phases in Bi2MnSe4
• Two Dimensional Antiferromagnetic Chern Insulator NiRuCl6
• Quantum anomalous Hall effect in stable 1T-YN${}_2$ monolayer with a large nontrivial band gap and high Chern number
• Quantum anomalous Hall effect in two-dimensional magnetic insulator heterojunctions
• Spin-Orientation Dependent Topological States in Two-Dimensional Antiferromagnetic NiTl${}_2$S${}_4$ Monolayers
• Two-particle Berry phase mechanism for Dirac and Majorana Kramers pairs of corner modes
• Spin-orbit coupling and topological phases for ultracold atoms
• Electrically tunable spin polarization of chiral edge modes in a quantum anomalous Hall insulator
• Bulk dissipation in the quantum anomalous Hall effect
• P-orbital magnetic topological states on square lattice
• Gate-Tunable Quantum Anomalous Hall Effects in MnBi${}_2$Te${}_4$ Thin Films
• Spin orientations of the spin-half Ir4+ ions in Sr3NiIrO6, Sr2IrO4 and Na2IrO3: Density functional, perturbation theory and Madelung potential analyses
• Novel Chern insulators with half-metallic edge states
• Chiral Topological Orders in an Optical Raman Lattice
• Topological spin texture of chiral edge states in photonic two-dimensional quantum walks
• Configuration-Sensitive Transport on Domain Walls of a Magnetic Topological Insulator
• Hinge Spin Polarization in Magnetic Topological Insulators Revealed by Resistance Switch
• Structure, phase stability, half-metallicity, and fully spin-polarized Weyl states in compound NaV2O4: a new example for topological spintronic material
• Electrically modulated SQUID with single Josephson junction coupled by a time-reversal breaking Weyl semimetal thin film
• Topological antiferromagnetic spintronics: Part of a collection of reviews on antiferromagnetic spintronics
• Chern insulator in a ferromagnetic two-dimensional electron system with Dresselhaus spin-orbit coupling
• Chiral edge state coupling theory of transport in quantum anomalous Hall insulators
• Dynamical detection of mean-field topological phases in an interacting Chern insulator
• Revisiting magnetic exchange interactions in transition metal doped Bi${}_2$Se${}_3$ using DFT+MFT
• Surface Conductivity in Antiferromagnetic Semiconductor CrSb${}_2$
• Volkov-Pankratov states on the edge of a quantum spin Hall system
• Giant Spin Transport Anisotropy in Magnetic Topological Insulators