Topological insulator quantum dot with tunable barriers

Abstract

Thin (6-7 quintuple layer) topological insulator Bi2Se3 quantum dot devices are demonstrated using ultrathin (2~4 quintuple layer) Bi2Se3 regions to realize semiconducting barriers which may be tuned from Ohmic to tunneling conduction via gate voltage. Transport spectroscopy shows Coulomb blockade with large charging energy >5 meV, with additional features implying excited states.

References in corpus (29)

• Two Dimensional Atomic Crystals
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Chiral tunneling and the Klein paradox in graphene
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• Chaotic Dirac billiard in graphene quantum dots
• First observation of Spin-Momentum Helical Locking in Bi2Se3 and Bi2Te3, demonstration of Topological-Order at 300K and a realization of topological-transport-regime
• Crossover of Three-Dimensional Topological Insulator of Bi2Se3 to the Two-Dimensional Limit
• Topological Surface States Protected From Backscattering by Chiral Spin Texture
• Aharonov-Bohm interference in topological insulator nanoribbons
• Experimental demonstration of the topological surface states protected by the time-reversal symmetry
• Electrically detected interferometry of Majorana fermions in a topological insulator
• Massive Dirac fermions and spin physics in an ultrathin film of topological insulator
• Topological origin of subgap conductance in insulating bilayer graphene
• Two-dimensional Dirac fermions in a topological insulator: transport in the quantum limit
• Probing Neutral Majorana Fermion Edge Modes with Charge Transport
• Oscillatory crossover from two dimensional to three dimensional topological insulators
• Strong surface scattering in ultrahigh mobility Bi2Se3 topological insulator crystals
• Quantum interference in macroscopic crystals of non-metallic Bi${}_2$Se${}_3$
• Anomalous Finite Size Effects on Surface States in the Topological Insulator Bi${}_2$Se${}_3$
• Surface State Transport and Ambipolar Electric Field Effect in Bi2Se3 Nanodevices
• Momentum-Resolved Landau-Level Spectroscopy of Dirac Surface State in Bi2Se3
• Measuring electron orbital magnetic moments in carbon nanotubes
• Aharonov-Bohm oscillations in disordered topological insulator nanowires
• Rashba spin-splitting control at the surface of the topological insulator Bi2Se3
• Anomalous Aharonov-Bohm conductance oscillations from topological insulator surface states
• Insulating behavior in ultra-thin bismuth selenide field effect transistors
• Observation of excited states in a graphene quantum dot
• Proposal for a Topological Plasmon Spin Rectifier
• Energy spectrum and broken spin-surface locking in topological insulator quantum dots

Cited by in corpus (20)

• Quantum interference and Aharonov-Bohm oscillations in topological insulators
• Magnetically Defined Qubits on 3D Topological Insulators
• A 3D topological insulator quantum dot for optically controlled quantum memory and quantum computing
• Gate-Controlled Quantum Dots Based on Two-Dimensional Materials
• Spin-polarized tunneling current through a thin film of topological insulator in a parallel magnetic field
• Self-assembled Bismuth Selenide (Bi2Se3) quantum dots grown by molecular beam epitaxy
• Optical response of a topological-insulator--quantum-dot hybrid interacting with a probe electric field
• Single-electron Transport in Graphene-like Nanostructures
• Absence of equilibrium edge currents in theoretical models of topological insulators
• Spherical topological-insulator nanoparticles: Quantum size effects and optical transitions
• Low-energy electronic properties of Weyl semimetal quantum dot
• Low-damage electron beam lithography for nanostructures on Bi${}_2$Te${}_3$-class topological insulator thin films
• Single-Electron Transistor Made of a 3D Topological Insulator Nanoplate
• Interaction effects in non-equilibrium transport properties of a four-terminal topological corner junction
• Versatile Large-Area Custom-Feature van der Waals Epitaxy of Topological Insulators
• Theory of magnetotransport in shaped topological insulator nanowires
• Correlation and current anomalies in helical quantum dots
• Formation of bound states from the edge states of 2D topological insulator by macroscopic magnetic barriers
• Charge qubits based on ultra-thin topological insulator films
• Electronic confinement of surface states in a topological insulator nanowire