Electronic properties of SnTe-class topological crystalline insulator materials

Abstract

The rise of topological insulators in recent years has broken new ground both in the conceptual cognition of condensed matter physics and the promising revolution of the electronic devices. It also stimulates the explorations of more topological states of matter. Topological crystalline insulator is a new topological phase, which combines the electronic topology and crystal symmetry together. In this article, we review the recent progress in the studies of SnTe-class topological crystalline insulator materials. Starting from the topological identifications in the aspects of the bulk topology, surface states calculations and experimental observations, we present the electronic properties of topological crystalline insulators under various perturbations, including native defect, chemical doping, strain, and thickness-dependent confinement effects, and then discuss their unique quantum transport properties, such as valley-selective filtering and helicity-resolved functionalities for Dirac fermions. The rich properties and high tunability make SnTe-class materials promising candidates for novel quantum devices.

arXiv comment15 pages, 15 figures, invited review

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• Ferroic Berry Curvature Dipole in a Topological Crystalline Insulator at Room Temperature
• Topological electronic structure of twin boundaries and twinning superlattices in the SnTe material class
• Localized Singlets and Ferromagnetic Fluctuations in the Dilute Magnetic Topological Insulator Sn${}_{0.95}$Mn${}_{0.05}$Te
• Realizing tunable Fermi level in SnTe by defect control