Tuning topological surface magnetism by bulk alloying

Abstract

Deploying an analytical atomistic model of the bulk band structure of the IV-VI semiconductors we connect the spin structure of the topological surface state to the crystal field and spin orbit coupling parameters of the bulk material. While the Dirac-Weyl (or equivalently, Rashba) type topological surface state is often assumed universal, we show that the physics of the surface state is strikingly non-universal. To see this explicitly we calculate the RKKY interaction, which may be viewed as a probe of this surface state spin structure, finding its \emph{qualitative form} depends on the values the bulk spin-orbit and crystal field parameters take. This opens the way to tune the spin interaction on the surface of a IV-VI topological insulator by, for instance varying the composition of the IV-VI ternary compounds, as well as highlighting the importance of the connection between bulk and surface physics in topological insulators.

References in corpus (22)

• Experimental realization of a topological crystalline insulator in SnTe
• Spin Polarization and Transport of Surface States in the Topological Insulators Bi2Se3 and Bi2Te3 from First Principles
• RKKY in half-filled bipartite lattices: graphene as an example
• Electrically controllable surface magnetism on the surface of topological insulator
• Ordering of magnetic impurities and tunable electronic properties of topological insulators
• Tunability of the k-space Location of the Dirac Cones in the Topological Crystalline Insulator Pb1-xSnxTe
• Topological Surface Transport in Epitaxial SnTe Thin Films Grown on Bi2Te3
• RKKY interaction of magnetic impurities in Dirac and Weyl semimetals
• Two types of Dirac-cone surface states on (111) surface of topological crystalline insulator SnTe
• The topological-crystalline-insulator (Pb,Sn)Te - surface states and their spin-polarization
• Pressure-induced Topological Phase Transitions in Rock-salt Chalcogenides
• Ruderman-Kittel-Kasuya-Yosida interaction in Weyl semimetals
• Electrically Tunable Magnetism in Magnetic Topological Insulators
• Observation of topological crystalline insulator surface states on (111)-oriented Pb${}_{1-x}$Sn${}_x$Se films
• RKKY Interaction On Surfaces of Topological Insulators With Superconducting Proximity Effect
• Self-consistent theory of ferromagnetism on the surface of a topological insulator
• $(111)$ surface states of SnTe
• Strong single-ion anisotropy and anisotropic interactions of magnetic adatoms induced by topological surface states
• Non-Linear Spin Susceptibility in Topological Insulators
• Classical spins in topological insulators
• Thermodynamics of localized magnetic moments in a Dirac conductor
• Persistent ferromagnetism and topological phase transition at the interface of a superconductor and a topological insulator

Cited by in corpus (1)

• RKKY interaction on the surface of three-dimensional Dirac semimetals