Proximity effects in a topological-insulator/Mott-insulator heterostructure

Abstract

We investigate proximity effects in a correlated heterostructure of a two-dimensional Mott insulator (MI) and a topological insulator (TI) by employing inhomogeneous dynamical mean-field theory. We show that the edge state of the TI induces strongly renormalized mid-gap states inside the MI region, which still have a remnant of the helical energy-spectrum. The penetration of low-energy electrons, which is controlled by the interface tunneling $V$, largely enhances the electron mass inside the MI and also splits a single Dirac-cone at edge sites into the spatially-separated two Dirac-cones in the strong $V$ region.

5 pages, 4 figures

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Cited by in corpus (7)

• Topological Insulator Materials
• Rashba spin orbit coupling in the Kane-Mele-Hubbard model
• Proximity Effects in Topological Insulator Heterostructures
• 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
• Spin-imbalance induced buried topological edge currents in Mott \& topological insulator heterostructures
• Electrical probe of spin-spiral order in quantum spin Hall/spin-spiral magnet van der Waals heterostructures