Ambipolar Field Effect in Topological Insulator Nanoplates of (BixSb1-x)2Te3

Abstract

Topological insulators represent a new state of quantum matter attractive to both fundamental physics and technological applications such as spintronics and quantum information processing. In a topological insulator, the bulk energy gap is traversed by spin-momentum locked surface states forming an odd number of surface bands that possesses unique electronic properties. However, transport measurements have often been dominated by residual bulk carriers from crystal defects or environmental doping which mask the topological surface contribution. Here we demonstrate (BixSb1-x)2Te3 as a tunable topological insulator system to manipulate bulk conductivity by varying the Bi/Sb composition ratio. (BixSb1-x)2Te3 ternary compounds are confirmed as topological insulators for the entire composition range by angle resolved photoemission spectroscopy (ARPES) measurements and ab initio calculations. Additionally, we observe a clear ambipolar gating effect similar to that observed in graphene using nanoplates of (BixSb1-x)2Te3 in field-effect-transistor (FET) devices. The manipulation of carrier type and concentration in topological insulator nanostructures demonstrated in this study paves the way for implementation of topological insulators in nanoelectronics and spintronics.

7 pages, 4 figures

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Cited by in corpus (105)

• Topological Insulator Materials
• Colloquium: Topological Band Theory
• Measurement of intrinsic Dirac fermion cooling on the surface of a topological insulator Bi${}_2$Se${}_3$ using time- and angle-resolved photoemission spectroscopy
• Electric-field control of spin-orbit torque in a magnetically doped topological insulator
• Ultra-low carrier concentration and surface dominant transport in Sb-doped Bi2Se3 topological insulator nanoribbons
• Topological Surface States and Dirac point tuning in ternary Bi2Te2Se class of topological insulators
• Topological insulators and thermoelectric materials
• Quantum Hall Effect on Top and Bottom Surface States of Topological Insulator (Bi1-xSbx)2Te3 Films
• Quantum interference and Aharonov-Bohm oscillations in topological insulators
• Surface States of Topological Insulators
• Zero-field dissipationless chiral edge transport and the nature of dissipation in the quantum anomalous Hall state
• Transport Properties of Topological Insulators: Band Bending, Bulk Metal-to-Insulator Transition, and Weak Anti-Localization
• Transport in two-dimensional topological materials: recent developments in experiment and theory
• Independent tuning of electronic properties and induced ferromagnetism in topological insulators with heterostructure approach
• Symmetry Protected Josephson Supercurrents in Three-Dimensional Topological Insulators
• Spin-Polarized Tunneling Study on Spin-Momentum Locking in the Topological Insulators
• High-Temperature Quantum Anomalous Hall Effect in n-p Codoped Topological Insulators
• Realization of a vertical topological p-n junction in epitaxial $\mathrm{S}{\mathrm{b}}_2\mathrm{T}{\mathrm{e}}_3/B{\mathrm{i}}_2\mathrm{T}{\mathrm{e}}_3$ heterostructures
• Quantum Anomalous Hall Effect in Time-Reversal-Symmetry Breaking Topological Insulators
• Observation of Anderson localization in ultrathin films of three-dimensional topological insulators
• Growth of High-Mobility Bi2Te2Se Nanoplatelets on hBN Sheets by van der Waals Epitaxy
• Gate-tuned Differentiation of Surface-conducting States in Bi1.5Sb0.5Te1.7Se1.3 Topological-insulator Thin Crystals
• Helicity dependent photocurrent in electrically gated (Bi,Sb)_2Te_3 thin films
• Probing two topological surface bands of Sb2Te3 by spin-polarized photoemission spectroscopy
• Carrier screening, transport, and relaxation in 3D Dirac semimetals
• Topological p-n Junction
• Electric Field Tuning of the Surface Band Structure of Topological Insulator Sb2Te3 Thin Films
• Parallel field magnetoresistance in topological insulator thin films
• Topological carbon materials: a new perspective
• Electrically tuned magnetic order and magnetoresistance in a topological insulator
• 2D transport and screening in topological insulator surface states
• Enhanced electron dephasing in three-dimensional topological insulators
• Origin of the low critical observing temperature of the quantum anomalous Hall effect in V-doped (Bi, Sb)2Te3 film
• Growth, characterization, and transport properties of ternary (Bi1-xSbx)2Te3 topological insulator layers
• NMR Probe of Metallic States in Nanoscale Topological Insulators
• Electrical resistance of individual defects at a topological insulator surface
• Topological insulator Bi2Se3 thin films as an alternative channel material in MOSFETs
• Tuning the Dirac point to the Fermi level in the ternary topological insulator (Bi${}_{1-x}$Sb${}_x$)${}_2$Te${}_3$
• Experimental evidence and control of the bulk-mediated intersurface coupling in topological insulator Bi2Te2Se nanoribbons
• Current-phase relation for Josephson effect through helical metal
• Stepwise quantized surface states and delayed Landau level hybridization in Co cluster-decorated BiSbTeSe2 topological insulator devices
• Large-Area and Transferred High-Quality Three-Dimensional Topological Insulator Bi2-xSbxTe3-ySey Ultrathin Film by Catalyst-Free Physical Vapor Deposition
• Ambipolar Surface Conduction in Ternary Topological Insulator Bi_2(Te_{1-x}Se_x)_3 Nanoribbons
• Artificial Intelligence for High-Throughput Discovery of Topological Insulators: the Example of Alloyed Tetradymites
• Electrostatic Coupling between Two Surfaces of a Topological Insulator Nanodevice
• Top gating of epitaxial (Bi_{1-x}Sb_x)2Te3 topological insulator thin films
• Persistent Optical Gating of a Topological Insulator
• Understanding Bulk Defects in Topological Insulators from Nuclear-Spin Interactions
• Spin-based Mach-Zehnder interferometry in topological insulator p-n junctions
• Unconventional Planar Hall Effect in Exchange-Coupled Topological Insulator-Ferromagnetic Insulator Heterostructures
• A Natural Topological Insulator
• Ambipolar transport in bulk crystals of a topological insulator by gating with ionic liquid
• Scanning Tunneling Microscopy of Gate Tunable Topological Insulator Bi2Se3 Thin Films
• Two-dimensional electronic transport on the surface of 3D topological insulators
• Three-dimensional topological insulators: A review on host materials
• Dirac states with knobs on: interplay of external parameters and the surface electronic properties of 3D topological insulators
• Faraday rotation due to surface states in the topological insulator (Bi${}_{1-x}$Sb${}_x$)${}_2$Te${}_3$
• Towards the manipulation of topological states of matter: A perspective from electron transport
• Laser-induced persistent photovoltage on the surface of a ternary topological insulator at room temperature
• Two-dimensional magnetotransport in Bi2Te2Se nanoplatelets
• Realization of bulk insulating property and carrier manipulation in reversible spin current regime of the ideal topological insulator TlBiSe2
• Top-down fabrication of bulk-insulating topological insulator nanowires for quantum devices
• Carrier dependent ferromagnetism in chromium doped topological insulator $C{r}_{0.2}B{i}_{x}S{b}_{1.8-x}T{e}_3$
• Defect Role in the Carrier Tunable Topological Insulator (Bi${}_{1-x}$Sb${}_x$)${}_2$Te${}_3$ Thin Films
• Simultaneous electrical-field-effect modulation of both top and bottom Dirac surface states of epitaxial thin films of three-dimensional topological insulators
• Weak Antilocalization and Universal Conductance Fluctuations in Bismuth Telluro-Sulfide Topological Insulators
• Disentangling surface and bulk transport in topological-insulator $p$-$n$ junctions
• Anti-site defect-induced disorder in compensated topological magnet MnBi${}_{2-x}$Sb${}_x$Te${}_4$
• Nanoscale $\beta$-Nuclear Magnetic Resonance Depth Imaging of Topological Insulators
• Dirac-Fermion-Assisted Interfacial Superconductivity in Epitaxial Topological Insulator/Iron Chalcogenide Heterostructures
• Second-Order Topological Insulator in Two-Dimensional C2N and Its Derivatives
• Shubnikov-de Haas oscillations in p and n-type topological insulator (Bi${}_x$Sb${}_{1-x}$)${}_2$Te${}_3$
• Chemical Potential Fluctuations in Topological Insulator (Bi${}_{0.5}$Sb${}_{0.5}$)${}_2$Te${}_3$ Films Visualized by Photocurrent Spectroscopy
• Dirac fermions at high-index surfaces of bismuth chalcogenide topological insulator nanostructures
• Impact of ultrafast transport on the high-energy states of a photoexcited topological insulator
• Superconducting proximity effect in $d$-wave cuprate/ graphene heterostructures
• Electron and Hole Injection via Charge Transfer at the Topological-Insulator $B{i}_{2-x}S{b}_{x}T{e}_{3-y}S{e}_y$/Organic-Molecule Interface
• Atomic diffusion-induced polarization and superconductivity in topological insulator-based heterostructures
• Electrically Tunable Wafer-Sized Three-Dimensional Topological Insulator Thin Films Grown by Magnetron Sputtering
• Robust Gapless Surface State against Surface Magnetic Impurities on (Bi${}_{0.5}$Sb${}_{0.5}$)${}_2$Te${}_3$ Evidenced by In Situ Magnetotransport Measurements
• Band structure of topological insulators from noise measurements in tunnel junctions
• Nonmagnetic-Doping Induced Quantum Anomalous Hall Effect in Topological Insulators
• Evolution of Dopant-Concentration-Induced Magnetic Exchange Interaction in Topological Insulator Thin Films
• Structural Phase Transition and Carrier Density Tuning in SnSexTe1-x Nanoplates for Topological Crystalline Insulators
• Electronic properties of one-dimensional nanostructures of the Bi${}_2$Se${}_3$ topological insulator
• Topological Nontrivial Phase in Hexagonal Antiperovskites A3BiB (A=Ba,Sr; B=P,N)
• Magnetic Proximity Effect in an Antiferromagnetic Insulator/Topological Insulator Heterostructure with Sharp Interface
• Theory of magnetotransport in shaped topological insulator nanowires
• Shubnikov de Haas quantum oscillation of the surface states in the metallic Bismuth Telluride sheets
• Resonant Tunneling Anisotropic Magnetoresistance Induced by Magnetic Proximity
• Strong and Weak Three-Dimensional Topological Insulators Probed by Surface Science Methods
• Nanosecond dynamics in intrinsic topological insulator ${\text{Bi}}_{2-x}{\text{Sb}}_x{\text{Se}}_3$ revealed by time-resolved optical reflectivity
• From classical to quantum regime of topological surface states via defect engineering
• Thickness dependence of electron-electron interactions in topological p-n junctions
• Environmental Doping-Induced Degradation of the Quantum Anomalous Hall Insulators
• Observation of a Smoothly Tunable Dirac Point in $Ge(B{i}_{x}S{b}_{1-x}{)}_{2}T{e}_4$
• Signatures of non-trivial band topology in LaAs/LaBi heterostructure
• Topological delocalization and tuning of surface channel separation in Bi2Se2Te Topological Insulator Thin films
• Inter-quintuple layer coupling and topological phase transitions in the chalcogenide topological insulators
• Non-local Chemical Potential Modulation in Topological Insulators Via Electric Field Driven Trapped Charge Migration
• Surface-dominated Conductivity of Few-layered Antimonene
• Exploring Structural and Electronic Properties of Topological Insulator/Graphene Nano-heterostructures
• Selective-Area Epitaxy of Bulk-Insulating (Bi${}_x$Sb${}_{1-x}$)${}_2$Te${}_3$ Films and Nanowires by Molecular Beam Epitaxy
• Meissner Effect and Nonreciprocal Charge Transport in Non-Topological 1T-CrTe2/FeTe Heterostructures
• Modulation of crystal and electronic structures in topological insulators by rare-earth doping