Optical conductivity of topological Kondo insulating states

Abstract

Using real-space dynamical mean field quantum Monte Carlo simulations, we study the optical conductivity of two-dimensional topological Kondo insulating states. We consider model parameters which allow us to consider mixed valence and local moment regimes. The real space resolution inherent to our approach reveals a renormalization of the hybridization gap as one approaches the edge. Low energy transport is dominated by the helical edge state and the corresponding Drude weight scales as the coherence scale of the heavy fermion state. The concomitant renormalization of the edge state velocity leads to a constant edge local density of states. We discuss the implication of our results for the three dimensional case.

arXiv comment7 pages, 8 figures

References in corpus (33)

• Topological Insulators
• Topological insulators and superconductors
• Quantum Spin Hall Effect in Graphene
• $Z_2$ Topological Order and the Quantum Spin Hall Effect
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Quantum Spin Hall Effect
• Nonlocal edge state transport in the quantum spin Hall state
• Topological Kondo Insulators
• Hybridization expansion impurity solver: General formulation and application to Kondo lattice and two-orbital models
• Low-temperature surface conduction in the Kondo insulator SmB${}_6$
• Correlated Topological Insulators with Mixed Valence
• Topological surface state in the Kondo Insulator Samarium Hexaboride
• Topological Insulators and Mott Physics from the Hubbard Interaction
• Robust Surface Hall Effect and Nonlocal Transport in SmB6: Indication for an Ideal Topological Insulator
• Correlation Effects in Quantum Spin-Hall Insulators: A Quantum Monte Carlo Study
• A theory of Topological Kondo Insulators
• Correlation effects in two-dimensional topological insulators
• Surface and Bulk Electronic Structure of the Strongly Correlated System SmB${}_6$ and Implications for a Topological Kondo Insulator
• Particle-hole symmetry and interaction effects in the Kane-Mele-Hubbard model
• Hybridization, Inter-Ion Correlation, and Surface States in the Kondo Insulator SmB6
• Topological Crystalline Kondo Insulator in Mixed Valence Ytterbium Borides
• Transfer of Spectral Weight in Spectroscopies of Correlated Electron Systems
• Universal probes of two-dimensional topological insulators: Dislocation and pi-flux
• Kondo hybridisation and the origin of metallic states at the (001) surface of SmB6
• Correlation effects on a topological insulator at finite temperatures
• The importance of Charge Fluctuations for the Topological Phase in SmB${}_6$
• Topological invariants, surface states, and interaction-driven phase transitions in correlated Kondo insulators with cubic symmetry
• Interaction-driven transition between topological states in a Kondo insulator
• Luttinger Liquid Physics and Spin-Flip Scattering on Helical Edges
• Dynamically generated edge states in topological Kondo insulators
• Dynamical mean-field study of the Mott transition in thin films
• Coherence scale of the two-dimensional Kondo Lattice model
• A Strongly-Interacting Dirac Liquid on the Surface of a Topological Kondo Insulator

Cited by in corpus (6)

• Coexistence of light and heavy surface states in a topological multi-band Kondo insulator
• Valence Characterization of Surface and Subsurface Region in SmB6
• Universal properties of the near-gap spectra of SmB6: dynamical mean-field calculations and photoemission experiments
• Restoration of topological properties at finite temperatures in a heavy-fermion system
• Spontaneous symmetry breaking and quantum Hall valley ordering on the surface of topological hexaborides
• Optical and magnetic excitations in the underscreened quasi-quartet Kondo lattice