Topology of SmB6 revisited by means of topological quantum chemistry
arXiv:2311.03442 · doi:10.1103/PhysRevResearch.6.033195
Abstract
The mixed-valence compound SmB6 with partially filled samarium 4f flat bands hybridizing with 5d conduction bands is a paramount example of a correlated topological heavy-fermion system. In this study we revisit the topology of SmB6 with the band theory paradigm and uncover previously overlooked aspects resulting from the formation of multiple topological gaps in the electronic structure. By invoking topological quantum chemistry (TQC) we provide a detailed classification of the strong and crystalline topological features that derive from the existence of such topological gaps. To corroborate this classification, we calculate Wilson loops and simulate the surface electronic structure using a minimal tight-binding model, allowing us to describe its surface states and confirm the crystalline topology. We finally discuss its implications for experiments.
References in corpus (15)
- Fermi-liquid instabilities at magnetic quantum phase transitions
- The space group classification of topological band insulators
- Correlated Topological Insulators with Mixed Valence
- Magnetic Topological Quantum Chemistry
- Building Blocks of Topological Quantum Chemistry: Elementary Band Representations
- All Topological Bands of All Nonmagnetic Stoichiometric Materials
- Kondo Breakdown in Topological Kondo Insulators
- Band Connectivity for Topological Quantum Chemistry: Band Structures As A Graph Theory Problem
- Multi-gap topology and non-Abelian braiding of phonons from first principles
- 4 crystal field ground state of the strongly correlated topological insulator SmB
- Scanning tunneling spectroscopy and surface quasiparticle interference in models for the strongly correlated topological insulators SmB6 and PuB6
- -band Hopf insulator
- Elementary band representations for the single-particle Green's function of interacting topological insulators
- Lecture Notes on Berry Phases and Topology
- Correlation Induced Magnetic Topological Phases in Mixed-Valence Compound SmB6