Topological Insulator Nanowires and Nanoribbons

Abstract

Recent theoretical calculations and photoemission spectroscopy measurements on the bulk Bi2Se3 material show that it is a three-dimensional topological insulator possessing conductive surface states with nondegenerate spins, attractive for dissipationless electronics and spintronics applications. Nanoscale topological insulator materials have a large surface-to-volume ratio that can manifest the conductive surface states and are promising candidates for devices. Here we report the synthesis and characterization of high quality single crystalline Bi2Se3 nanomaterials with a variety of morphologies. The synthesis of Bi2Se3 nanowires and nanoribbons employs Au-catalyzed vapor-liquid-solid (VLS) mechanism. Nanowires, which exhibit rough surfaces, are formed by stacking nanoplatelets along the axial direction of the wires. Nanoribbons are grown along [11-20] direction with a rectangular cross-section and have diverse morphologies, including quasi-one-dimensional, sheetlike, zigzag and sawtooth shapes. Scanning tunneling microscopy (STM) studies on nanoribbons show atomically smooth surfaces with ~ 1 nm step edges, indicating single Se-Bi-Se-Bi-Se quintuple layers. STM measurements reveal a honeycomb atomic lattice, suggesting that the STM tip couples not only to the top Se atomic layer, but also to the Bi atomic layer underneath, which opens up the possibility to investigate the contribution of different atomic orbitals to the topological surface states. Transport measurements of a single nanoribbon device (four terminal resistance and Hall resistance) show great promise for nanoribbons as candidates to study topological surface states.

arXiv commentNano Letters, Article ASAP

References in corpus (4)

• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
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Cited by in corpus (73)

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• Evidence for electron-electron interaction in topological insulator thin films
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• Rashba spin-splitting control at the surface of the topological insulator Bi2Se3
• Two-dimensional surface charge transport in topological insulators
• Ultra-thin Topological Insulator Bi2Se3 Nanoribbons Exfoliated by Atomic Force Microscopy
• Transport in three-dimensional topological insulators: theory and experiment
• Observation of the superconducting proximity effect and possible evidence for Pearl vortices in a candidate topological insulator
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• Magnetic Doping and Kondo Effect in Bi2Se3 Nanoribbons
• Stability of Majorana Fermions in Proximity-Coupled Topological Insulator Nanowires
• Growth of High-Mobility Bi2Te2Se Nanoplatelets on hBN Sheets by van der Waals Epitaxy
• Helical Luttinger liquid in topological insulator nanowires
• Structural and Electrical Characterization of Bi2Se3 Nanostructures Grown by Metalorganic Chemical Vapor Deposition
• Synthesis of SnTe Nanoplates with {100} and {111} Surfaces
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• Two dimensional topological insulators with tunable band gaps: HgTe and HgSe monolayers
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• Nanowires: A route to efficient thermoelectric devices
• Thermoelectric performance of classical topological insulator nanowires
• Low-velocity anisotropic Dirac fermions on the side surface of topological insulators
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• Spectral properties of Luttinger liquids: A comparative analysis of regular, helical, and spiral Luttinger liquids
• Novel synthesis of topological insulator based nanostructures (Bi2Te3) demonstrating high performance photodetection
• Conductance modulation in topological insulator Bi2Se3 thin films with ionic liquid gating
• Valley-dependent Corner States in Honeycomb Photonic Crystal without Inversion Symmetry
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• Detecting Perfect Transmission in Josephson Junctions on the Surface of Three Dimensional Topological Insulators
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• Spin-orbit interactions in a helical Luttinger liquid with a Kondo impurity
• Synthesis of narrow SnTe nanowires using alloy nanoparticles
• Multiple Symmetry-Protected Dirac Nodal Lines in A Quasi-One-Dimensional Semimetal
• Low-energy properties of fractional helical Luttinger liquids
• Magnetotransport signatures of three-dimensional topological insulator nanostructures
• Two-dimensional magnetotransport in Bi2Te2Se nanoplatelets
• Robustness of Topological Superconductivity in Proximity-Coupled Topological Insulator Nanoribbons
• Probing Dirac Fermion Dynamics in Topological Insulator Bi${}_2$Se${}_3$ Films with Scanning Tunneling Microscope
• Controlled MOCVD growth of Bi2Se3 topological insulator nanoribbons
• Nanomaterials of the topological crystalline insulators, Pb_(1-x)Sn_(x)Te and Pb_(1-x)Sn_(x)Se
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• Conductance fluctuations and disorder induced $\nu =0$ quantum Hall plateau in topological insulator nanowires
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• Substrate-Independent Catalyst-Free Synthesis of High-Purity Bi2Se3 Nanostructures
• Anomalous nuclear magnetic resonance spectra in Bi${}_2$Se${}_3$ nanowires
• Electronic properties of one-dimensional nanostructures of the Bi${}_2$Se${}_3$ topological insulator
• Self-assembled nano-columns in Bi2Se3 grown by molecular beam epitaxy
• Transport in Selectively Magnetically Doped Topological Insulator Wires
• Low-energy modeling of three-dimensional topological insulator nanostructures
• Spin current in an electron waveguide tunnel-coupled to topological insulator
• Reducing the impact of bulk doping on transport properties of Bi-based 3D topological insulators
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• Low-Frequency Current Fluctuations in Graphene-like Exfoliated Thin-Films of Topological Insulators