Band symmetries of mixed-valence topological insulator: SmB6

Abstract

We have investigated the band structure and the band symmetry of mixed-valence insulator SmB${}_6$ systematically within the density functional theory (DFT). We have analyzed the symmetries and characters of Sm $4f$ and $5d$ bands near the Fermi level ($E_F$) in terms of the non-relativistic real cubic bases as well as the relativistic complex bases incorporating the spin-orbit coupling and the cubic crystal field. Further, we have found that the semi-core band located at $\sim 15$ eV below $E_F$ has the mixed parity and thereby affects the parity eigenvalues of the special $\mathbf{k}$-points considerably. We have discussed the possible surface states and topological class of SmB${}_6$, based on the bulk parity tables.

6 pages, 8 figures, 1 table

References in corpus (5)

• Topological Insulators with Inversion Symmetry
• Surface electronic structure of the topological Kondo insulator candidate correlated electron system SmB6
• Correlated Topological Insulators with Mixed Valence
• Termination-dependent Surface In-gap States in a Mixed-valent Topological Insulator: SmB${}_6$
• SmB6 Photoemission: Past and Present

Cited by in corpus (26)

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• Additional energy scale in SmB${}_6$ at low temperature
• 4$f$ crystal field ground state of the strongly correlated topological insulator SmB${}_6$
• Surface-state spin textures and mirror Chern numbers in topological Kondo insulators
• Pressure-resistant intermediate valence in Kondo insulator SmB6
• Topological properties and the dynamical crossover from mixed-valence to Kondo-lattice behavior in golden phase of SmS
• Distinct topological crystalline phases in models for the strongly correlated topological insulator SmB6
• Self-consistent GW method: O(N) algorithm for polarizability and self energy
• Observation of a well-defined hybridization gap and in-gap states on the SmB6 (001) surface
• Critical role of magnetic moments in heavy-fermion materials: revisiting mysteries of SmB${}_6$
• Valence Characterization of Surface and Subsurface Region in SmB6
• Spin textures on general surfaces of the correlated topological insulator SmB6
• The anomalous antiferromagnetic topological phase in pressurized SmB6
• Multiple topological Dirac cones in a mixed-valent Kondo semimetal: g-SmS
• A RIXS investigation of the crystal-field splitting of Sm${}^{3+}$ in SmB${}_6$
• Bulk Electronic Structure of Lanthanum Hexaboride (LaB6) by Hard X-ray Angle-Resolved Photoelectron Spectroscopy
• Selective Control of Surface Spin Current in Topological Materials based on Pyrite-type OsX2 (X = Se, Te) Crystals
• Universal properties of the near-gap spectra of SmB6: dynamical mean-field calculations and photoemission experiments
• Vortex states in a non-Abelian magnetic field
• Comparative Scanning Tunneling Microscopy Study on Hexaborides
• An STM perspective on hexaborides: Surface states of the Kondo insulator SmB${}_6$
• Phase stability in SmB${}_6$
• Tunable zero-energy Dirac and Luttinger nodes in a two-dimensional topological superconductor
• Importance of orbital fluctuations for the magnetic dynamics in heavy-fermion compound SmB${}_6$
• The role of the short range magnetic correlations on the gap opening of the topological Kondo insulators
• f-electron charge densities probed using core level non-resonant inelastic x-ray scattering