Topological Crystalline Insulator and Quantum Anomalous Hall States in IV-VI based Monolayers and their Quantum Wells

Abstract

Different from the two-dimensional (2D) topological insulator, the 2D topological crystalline insulator (TCI) phase disappears when the mirror symmetry is broken, e.g., upon placing on a substrate. Here, based on a new family of 2D TCIs - SnTe and PbTe monolayers - we theoretically predict the realization of the quantum anomalous Hall effect with Chern number C = 2 even when the mirror symmetry is broken. Remarkably, we also demonstrate that the considered materials retain their large-gap topological properties in quantum well structures obtained by sandwiching the monolayers between NaCl layers. Our results demonstrate that the TCIs can serve as a seed for observing robust topologically non-trivial phases.

arXiv comment5 pages, submitted on 27th Feb 2015

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Cited by in corpus (13)

• Topological Phases in Two-Dimensional Materials: A Brief Review
• Theory of interacting topological crystalline insulators
• Discovery of a two-dimensional topological insulator in SiTe
• Robust Dual Topological Character with Spin-Valley Polarization in a Monolayer of the Dirac Semimetal Na${}_3$Bi
• Two dimensional silicon chalcogenides with high carrier mobility for photocatalytic water splitting
• Topological Zero-Dimensional Defect and Flux States in Three-Dimensional Insulators
• Spin-polarization control driven by a Rashba-type effect breaking the mirror symmetry in two-dimensional dual topological insulators
• Topological, Valleytronic, and Optical Properties of Monolayer PbS
• Interplay between boundary conditions and Wilson's mass in Dirac-like Hamiltonians
• Topological Properties of SnSe/EuS and SnTe/CaTe Interfaces
• Topological Nonsymmorphic Ribbons out of Symmorphic Bulk
• Topological superconductor with a large Chern number and a large bulk excitation gap in single layer graphene
• Topological electronic structure of twin boundaries and twinning superlattices in the SnTe material class