Mott Physics on Helical Edges of 2D Topological Insulators

Abstract

We study roles of electron correlations on topological insulators on the honeycomb lattice with the spin-orbit interaction. Accurate variational Monte Carlo calculations show that the increasing on-site Coulomb interactions cause a strong suppression of the charge Drude weight in the helical-edge metallic states leading to a presumable Mott transition from a conventional topological insulator to an edge Mott insulator before a transition to a bulk antiferromagnetic insulator. The intermediate bulk-topological and edge-Mott-insulator phase has a helical spin-liquid character with the protected time-reversal symmetry.

4 pages, 4 figures

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Cited by in corpus (13)

• Correlation effects in two-dimensional topological insulators
• Characterization of a topological Mott insulator in one dimension
• Topological antiferromagnetic phase in a correlated Bernevig-Hughes-Zhang model
• Kondo lattice on the edge of a two-dimensional topological insulator
• Cellular dynamical mean-field theory study of an interacting topological honeycomb lattice model at finite temperature
• Stability of Multinode Dirac Semimetals against Strong Long-Range Correlations
• Electron Correlation Induced Spontaneous Symmetry Breaking and Weyl Semimetal Phase in a Strongly Spin-Orbit Coupled System
• Topological phase in a two-dimensional metallic heavy-fermion system
• Rashba coupling and magnetic order in correlated helical liquids
• Magnetic phases and unusual topological electronic structures of Weyl semimetals in strong interaction limit
• Coulomb drag in topological materials
• Buried topological edge state associated with interface between topological band insulator and Mott insulator
• Valence Bond Phases in $S=1/2$ Kane-Mele-Heisenberg Model