Quantum Hall Effect on Top and Bottom Surface States of Topological Insulator (Bi1-xSbx)2Te3 Films

Abstract

The three-dimensional (3D) topological insulator (TI) is a novel state of matter as characterized by two-dimensional (2D) metallic Dirac states on its surface. Bi-based chalcogenides such as Bi2Se3, Bi2Te3, Sb2Te3 and their combined/mixed compounds like Bi2Se2Te and (Bi1-xSbx)2Te3 are typical members of 3D-TIs which have been intensively studied in forms of bulk single crystals and thin films to verify the topological nature of the surface states. Here, we report the realization of the Quantum Hall effect (QHE) on the surface Dirac states in (Bi1-xSbx)2Te3 films (x = 0.84 and 0.88). With electrostatic gate-tuning of the Fermi level in the bulk band gap under magnetic fields, the quantum Hall states with filling factor ν= \pm 1 are resolved with quantized Hall resistance of Ryx = h/e2 and zero longitudinal resistance, owing to chiral edge modes at top/bottom surface Dirac states. Furthermore, the appearance of a ν= 0 state (σxy = 0) reflects a pseudo-spin Hall insulator state when the Fermi level is tuned in between the energy levels of the non-degenerate top and bottom surface Dirac points. The observation of the QHE in 3D TI films may pave a way toward TI-based electronics.

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Cited by in corpus (32)

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• Enhanced electron dephasing in three-dimensional topological insulators
• Bulk quantum Hall effect of spin-valley-coupled Dirac fermions in a polar antiferromagnet BaMnSb${}_2$
• Two-dimensional topological insulator state in cadmium arsenide thin films
• Smart patterning for topological pumping of elastic surface waves
• Solution to the hole-doping problem and tunable quantum Hall effect in Bi${}_2$Se${}_3$ thin films
• Weak Localization and Antilocalization in Topological Materials with Impurity Spin-Orbit Interactions
• Topological insulators based on HgTe
• Double quantum dot Cooper-pair splitter at finite couplings
• Laser-induced persistent photovoltage on the surface of a ternary topological insulator at room temperature
• Observation of multichannel quantum coherent transport and electron-electron interaction in Bi2Te3 single crystal
• 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${}_2$
• Phase transition and anomalous scaling in the quantum Hall transport of topological insulator Sn-Bi1.1Sb0.9Te2S devices
• Top-down fabrication of bulk-insulating topological insulator nanowires for quantum devices
• Zeeman field-induced two-dimensional Weyl semimetal phase in cadmium arsenide
• Ubiquitous order-disorder transition in the Mn antisite sublattice of the (MnBi${}_2$Te${}_4$)(Bi${}_2$Te${}_3$)${}_n$ magnetic topological insulators
• Particle-Hole Asymmetry in Gapped Topological Insulator Surface States
• Conductance fluctuations and disorder induced $\nu =0$ quantum Hall plateau in topological insulator nanowires
• Band tilt induced nonlinear Nernst effect in topological insulators: An efficient generation of high-performance spin polarization
• Signature of Parity Anomaly: Crossover from One Half to Integer Quantized Hall Conductance in a Finite Magnetic Field
• Structurally and Chemically Compatible BiInSe3 Substrate for Topological Insulator Thin Films
• Kerr, Faraday, and Magnetoelectric Effects in MnBi${}_2$Te${}_4$ Thin Films
• Metal-insulator transition and tunable Dirac-cone surface state in the topological insulator TlBi1-xSbxTe2 studied by angle-resolved photoemission
• High-field Studies on Layered Magnetic and Polar Dirac Metals
• Unidirectional Seebeck effect in magnetic topological insulators
• Gate Tunable Supercurrent in Josephson Junctions Based on Bi2Te3 Topological Insulator Thin Films
• From classical to quantum regime of topological surface states via defect engineering
• Edge and bulk states in Weyl-orbit quantum Hall effect as studied by Corbino measurements