Quantum transport of two-species Dirac fermions in dual-gated three-dimensional topological insulators

Abstract

Topological insulators are a novel class of quantum matter with a gapped insulating bulk yet gapless spin helical Dirac fermion conducting surface states. Here, we report local and non-local electrical and magneto transport measurements in dual-gated BiSbTeSe2 thin film topological insulator devices, with conduction dominated by the spatially separated top and bottom surfaces, each hosting a single species of Dirac fermions with independent gate control over the carrier type and density. We observe many intriguing quantum transport phenomena in such a fully-tunable two-species topological Dirac gas, including a zero-magnetic-field minimum conductivity close to twice the conducatance quantum at the double Dirac point, a series of ambipolar two-component half-integer Dirac quantum Hall states and an electron-hole total filling factor zero state (with a zero-Hall plateau), exhibiting dissipationless (chiral) and dissipative (non-chiral) edge conduction respectively. Such a system paves the way to explore rich physics ranging from topological magnetoelectric effects to exciton condensation.

24 pages, including 4 figures in main text, 3 figures in supplemental material

References in corpus (20)

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• Measurement of Scattering Rate and Minimum Conductivity in Graphene
• Phase Coherent Transport of Charges in Graphene Quantum Billiard
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• Single valley Dirac fermions in zero-gap HgTe quantum wells
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• Metal-to-Insulator Switching in Quantum Anomalous Hall States
• Topological magneto-electric effects in thin films of topological insulators
• Record Surface State Mobility and Quantum Hall Effect in Topological Insulator Thin Films via Interface Engineering
• Observation of the zero Hall plateau in a quantum anomalous Hall insulator
• Electrostatic Coupling between Two Surfaces of a Topological Insulator Nanodevice
• Nonlocal transport near the charge neutrality point in a two-dimensional electron-hole system
• Two-dimensional electronic transport on the surface of 3D topological insulators
• Charge and spin transport in edge channels of a $\nu =0$ quantum Hall system on the surface of topological insulators
• Simultaneous electrical-field-effect modulation of both top and bottom Dirac surface states of epitaxial thin films of three-dimensional topological insulators

Cited by in corpus (41)

• Planar Hall effect from the surface of topological insulators
• Observation of high-temperature quantum anomalous Hall regime in intrinsic MnBi${}_2$Te${}_4$/Bi${}_2$Te${}_3$ superlattice
• Transport in two-dimensional topological materials: recent developments in experiment and theory
• Spin Proximity Effects in Graphene/Topological Insulator Heterostructures
• Electric control of a canted-antiferromagnetic Chern insulator
• Giant Edelstein effect in Topological-Insulator--Graphene heterostructures
• Two-Dimensional Lattice Model for the Surface States of Topological Insulators
• Two-dimensional topological insulator state in cadmium arsenide thin films
• Anomalous low-temperature enhancement of supercurrent in topological-insulator nanoribbon Josephson junctions: evidence for low-energy Andreev bound states
• Stepwise quantized surface states and delayed Landau level hybridization in Co cluster-decorated BiSbTeSe2 topological insulator devices
• Solution to the hole-doping problem and tunable quantum Hall effect in Bi${}_2$Se${}_3$ thin films
• Signatures of Topological Superconductivity in Bulk Insulating Topological Insulator BiSbTe${}_{1.25}$Se${}_{1.75}$ in Proximity with Superconducting NbSe${}_2$
• Tuning insulator-semimetal transitions in 3D topological insulator thin films by inter-surface hybridization and in-plane magnetic fields
• Experimental evidence for topological surface states wrapping around bulk SnTe crystal
• Surface charge conductivity of topological insulator in a magnetic field: effect of hexagonal warping
• Gate-tunable supercurrent and multiple Andreev reflections in a superconductor-topological insulator nanoribbon-superconductor hybrid device
• Tunable Coupling between Surface States of a Three-Dimensional Topological Insulator in the Quantum Hall Regime
• Gate voltage controlled thermoelectric figure of merit in three-dimensional topological insulator nanowires
• Towards the manipulation of topological states of matter: A perspective from electron transport
• Half-Quantized Helical Hinge Currents in Axion Insulators
• Van der Waals heterostructures with spin-orbit coupling
• Giant nonlocal edge conduction in the axion insulator state of MnBi2Te4
• Quantum-Hall to Insulator Transition in Ultra-low-carrier-density Topological Insulator Films and a Hidden Phase of the Zeroth Landau Level
• Interaction between counter-propagating quantum Hall edge channels in the 3D topological insulator BiSbTeSe${}_2$
• Zeeman field-induced two-dimensional Weyl semimetal phase in cadmium arsenide
• Facet Dependent Topological Phase Transition in Bi4Br4
• 2D-Dirac surface states and bulk gap probed via quantum capacitance in a 3D topological insulator
• Structurally and Chemically Compatible BiInSe3 Substrate for Topological Insulator Thin Films
• Spatially varying electronic dephasing in three dimensional topological insulators
• Electron-Hole Asymmetry of Surface States in Topological Insulator Sb2Te3 Thin Films Revealed by Magneto-Infrared Spectroscopy
• Gate tunable quantum Hall effects in defect-suppressed Bi2Se3 films
• Conduction of surface electrons in a topological insulator with spatially random magnetization
• Signature of Anomalous Andreev bound states in magnetic Josephson junction of noncentrosymmetric superconductor on a topological insulator
• Gate field effects on the topological insulator BiSbTeSe2 interface
• From classical to quantum regime of topological surface states via defect engineering
• Strong and Weak Three-Dimensional Topological Insulators Probed by Surface Science Methods
• Observation of the possible chiral edge mode in Bi1-xSbx
• Resistively detected NMR as a probe of the topological nature of conducting edge/surface states
• Highly skewed current-phase relation in superconductor-topological insulator-superconductor Josephson junctions
• Influence of Device Geometry on Transport Properties of Topological Insulator Microflakes
• Super-resonant transport of topological surface states subjected to in-plane magnetic fields