Synthesis of SnTe Nanoplates with {100} and {111} Surfaces

Abstract

SnTe is a topological crystalline insulator that possesses spin-polarized, Dirac-dispersive surface states protected by crystal symmetry. Multiple surface states exist on the {100}, {110}, and {111} surfaces of SnTe, with the band structure of surface states depending on the mirror symmetry of a particular surface. Thus, to access surface states selectively, it is critical to control the morphology of SnTe such that only desired crystallographic surfaces are present. Here, we grow SnTe nanostructures using vapor-liquid-solid and vapor-solid growth mechanisms. Previously, SnTe nanowires and nanocrystals have been grown.1-4 In this report, we demonstrate synthesis of SnTe nanoplates with lateral dimensions spanning tens of microns and thicknesses of a hundred nanometers. The top and bottom surfaces are either (100) or (111), maximizing topological surface states on these surfaces. Magnetotransport on these SnTe nanoplates shows high bulk carrier density, consistent with bulk SnTe crystals arising due to defects such as Sn vacancies. In addition, we observe a structural phase transition in these nanoplates from the high temperature rock salt to low temperature rhombohedral structure. For nanoplates with very high carrier density, we observe a slight upturn in resistance at low temperatures, indicating electron-electron interactions.

arXiv commentNano Lett., Article ASAP,2014

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Cited by in corpus (16)

• Colloquium: Topological Band Theory
• Crystal Field Effect Induced Topological Crystalline Insulators In Monolayer IV-VI Semiconductors
• Revealing surface states in In-doped SnTe superconducting nanoplates with low bulk mobility
• Topological Crystalline Insulator Nanostructures
• Electrically Tunable Quantum Spin Hall State in Topological Crystalline Insulator Thin films
• Topological, Valleytronic, and Optical Properties of Monolayer PbS
• Surface oxidation and thermoelectric properties of indium-doped tin telluride nanowires
• Synthesis of narrow SnTe nanowires using alloy nanoparticles
• Defect-free SnTe topological crystalline insulator nanowires grown by molecular beam epitaxy on graphene
• Surface Magnetism in Topological Crystalline Insulators
• Superconducting Sn_{1-x}In_{x}Te Nanoplates
• Prediction of Topological Crystalline Insulator and Topological Phase Transitions in Two-dimensional PbTe Films
• Single Crystalline Colloidal Quasi-Two-Dimensional Tin Telluride
• Template Mediated Formation of Colloidal Two-Dimensional Tin Telluride Nanosheets and the Role of the Ligands
• Structural Phase Transition and Carrier Density Tuning in SnSexTe1-x Nanoplates for Topological Crystalline Insulators
• Suppression of the Spectral Weight of Topological Surface States on the Nanoscale via Local Symmetry Breaking