Highly tunable magnetic coupling in ultrathin topological insulator films due to impurity resonances
arXiv:2003.05539 · doi:10.1103/PhysRevB.102.174446
Abstract
We theoretically investigate the exchange interaction between magnetic impurities in ultrathin BiSe topological insulator films by taking into account the low-energy states produced by the impurities. We find that the locally induced impurity resonances strongly influence the exchange interaction between magnetic moments. In particular, we find a non-collinear alignment being more favorable than the collinear ferromagnetic alignment preferred when impurity states are ignored and only the pristine topological insulator band structure is considered. Moreover, we show that by applying of an electric field perpendicular to the ultrathin film, the exchange interaction can be drastically enhanced. This opens for the possibility of highly tunable magnetism by electric field.
References in corpus (39)
- Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
- Quantized Anomalous Hall Effect in Magnetic Topological Insulators
- Crossover of Three-Dimensional Topological Insulator of Bi2Se3 to the Two-Dimensional Limit
- Electronic Properties of Disordered Two-Dimensional Carbon
- High-precision realization of robust quantum anomalous Hall state in a hard ferromagnetic topological insulator
- Anomalous Hall effect arising from noncollinear antiferromagnetism
- 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
- A topological insulator surface under strong Coulomb, magnetic and disorder perturbations
- Effective continuous model for surface states and thin films of three dimensional topological insulators
- Carrier-independent ferromagnetism and giant anomalous Hall effect in magnetic topological insulator
- Electrically controllable surface magnetism on the surface of topological insulator
- Impurity States in Graphene
- Impurity-induced states on the surface of 3D topological insulators
- Ordering of magnetic impurities and tunable electronic properties of topological insulators
- Photoemission Spectroscopy of Magnetic and Non-magnetic Impurities on the Surface of the BiSe Topological Insulator
- Twisted exchange interaction between localized spins embedded in a one- or two-dimensional electron gas with Rashba spin-orbit coupling
- In-plane magnetic anisotropy of Fe atoms on BiSe(111)
- Experimental Verification of Van Vleck Nature of Long-Range Ferromagnetic Order in Vanadium-Doped Three-Dimensional Topological Insulator SbTe
- Strong potential impurities on the surface of a topological insulator
- Electrically Tunable Magnetism in Magnetic Topological Insulators
- Systematics of electronic and magnetic properties in the transition metal doped SbTe quantum anomalous Hall platform
- Filling of magnetic-impurity-induced gap in topological insulators by potential scattering
- Indirect exchange interaction between magnetic adatoms in a monolayer MoS2
- Topological phase and edge states dependence of the RKKY interaction in zigzag silicene nanoribbon
- Self-consistent theory of ferromagnetism on the surface of a topological insulator
- Effect of Rashba splitting on RKKY interaction in topological insulator thin films
- Strong out-of-plane magnetic anisotropy of Fe adatoms on BiTe
- Ruderman-Kittel-Kasuya-Yosida interaction in biased bilayer graphene
- RKKY interaction in gapped or doped graphene
- Ferromagnetism in a dilute magnetic semiconductor -- Generalized RKKY interaction and spin-wave excitations
- Highly tunable time-reversal-invariant topological superconductivity in topological insulator thin films
- Impurity scattering on the surface of topological insulator thin films
- Chiral magnetism of magnetic adatoms generated by Rashba electrons
- Dynamical exchange interaction between localized spins out of equilibrium
- Non-Linear Spin Susceptibility in Topological Insulators
- Co atoms on BiSe revealing a coverage dependent spin reorientation transition
- Optical responses and optical activity of ultrathin films of topological insulator
- Spin-spin interaction in the bulk of topological insulators