Electrically tunable surface-to-bulk coherent coupling in topological insulator thin films

Abstract

We study coherent transport in density tunable micro-devices patterned from thin films of the topological insulator (TI) Bi2Se3. The devices exhibit pronounced electric field effect, including ambipolar modulation of the resistance with an on/off ratio of 500%. We show that the weak antilocalization (WAL) correction to conductance is sensitive to the number of coherently coupled channels, which in a TI includes the top and bottom surface and the bulk carriers. These are separated into coherently independent channels by the application of gate voltage and at elevated temperatures. Our results are consistent with a model where channel separation is determined by a competition between the coherence time and surface-bulk scattering time.

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Cited by in corpus (123)

• Topological Insulator Materials
• Manifestation of Topological Protection in Transport Properties of Epitaxial Bi2Se3 Thin Films
• Measurement of intrinsic Dirac fermion cooling on the surface of a topological insulator Bi${}_2$Se${}_3$ using time- and angle-resolved photoemission spectroscopy
• Ultra-low carrier concentration and surface dominant transport in Sb-doped Bi2Se3 topological insulator nanoribbons
• THz response and colossal Kerr rotation from the surface states of the topological insulator Bi${}_2$Se${}_3$
• Topological-Metal to Band-Insulator Transition in (Bi1-xInx)2Se3 Thin Films
• 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
• Bilinear magneto-electric resistance as a probe of three-dimensional spin texture in topological surface states
• Weak Localization and Antilocalization in Topological Insulator Thin Films with Coherent Bulk-Surface Coupling
• Linear magnetoresistance in topological insulators: Quantum phase coherence effects at high temperatures
• 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
• Opportunities in topological insulator devices
• Weak antilocalization in topological insulator Bi${}_2$Te${}_3$ microflakes
• Coherent Topological Transport on the Surface of Bi2Se3
• Topological Surface Transport in Epitaxial SnTe Thin Films Grown on Bi2Te3
• Emergence of decoupled surface transport channels in bulk insulating Bi2Se3 thin films
• Magneto-resistance up to 60 Tesla in Topological Insulator Bi2Te3 Thin Films
• Observation of Anderson localization in ultrathin films of three-dimensional topological insulators
• Gate-tuned Differentiation of Surface-conducting States in Bi1.5Sb0.5Te1.7Se1.3 Topological-insulator Thin Crystals
• Weak Antilocalization and Conductance Fluctuation in a Sub-micrometer-sized Wire of Epitaxial Bi2Se3
• Structural and Electrical Characterization of Bi2Se3 Nanostructures Grown by Metalorganic Chemical Vapor Deposition
• Mapping the chemical potential dependence of current-induced spin polarization in a topological insulator
• Two-dimensional universal conductance fluctuations and the electron-phonon interaction of topological surface states in Bi2Te2Se nanoribbons
• Quasi-ballistic transport of Dirac fermions in a Bi2Se3 nanowire
• Spin-helical transport in normal and superconducting topological insulators
• Observation of spin-momentum locked surface states in amorphous Bi${}_2$Se${}_3$
• Quantum Coherent Transport in SnTe Topological Crystalline Insulator Thin Films
• Molecular Beam Epitaxial Growth of Bi2Te3 and Sb2Te3 Topological Insulators on GaAs (111) Substrates: A Potential Route to Fabricate Topological Insulator p-n Junction
• Ordered Growth of Topological Insulator Bi2Se3 Thin Films on Dielectric Amorphous SiO2 by MBE
• 2D layered transport properties from topological insulator Bi${}_2$Se${}_3$ single crystals and micro flakes
• Parallel field magnetoresistance in topological insulator thin films
• Weak localization and weak anti-localization in topological insulators
• Magnetotransport and induced superconductivity in Bi based three-dimensional topological insulators
• Fingerprints of Inelastic Transport at the Surface of the Topological Insulator Bi2Se3: Role of Electron-Phonon Coupling
• 2D transport and screening in topological insulator surface states
• Enhanced electron dephasing in three-dimensional topological insulators
• Linear magneto-resistance versus weak antilocalization effects in Bi${}_2$Te${}_3$ films
• Weak Localization Effects as Evidence for Bulk Quantization in Thin Films Bi2Se3
• Two-dimensional quantum transport of multivalley (111) surface state in topological crystalline insulator SnTe thin films
• Experimental evidence and control of the bulk-mediated intersurface coupling in topological insulator Bi2Te2Se nanoribbons
• Large-Area and Transferred High-Quality Three-Dimensional Topological Insulator Bi2-xSbxTe3-ySey Ultrathin Film by Catalyst-Free Physical Vapor Deposition
• Signature of a topological phase transition in the Josephson supercurrent through a topological insulator
• Ambipolar Surface Conduction in Ternary Topological Insulator Bi_2(Te_{1-x}Se_x)_3 Nanoribbons
• Top gating of epitaxial (Bi_{1-x}Sb_x)2Te3 topological insulator thin films
• Proximity effect between a topological insulator and a magnetic insulator with large perpendicular anisotropy
• Gate-tunable transport properties of in-situ capped Bi${}_2$Te${}_3$ topological insulator thin films
• Surface-to-bulk scattering in topological insulator films
• A Natural Topological Insulator
• Ambipolar transport in bulk crystals of a topological insulator by gating with ionic liquid
• Aging and reduced bulk conductance in thin films of the topological insulator Bi${}_2$Se${}_3$
• Linear magnetoresistance and surface to bulk coupling in topological insulator thin films
• Two-dimensional electronic transport on the surface of 3D topological insulators
• Transferring MBE-grown topological insulator films to arbitrary substrates and Metal-insulator transition via Dirac gap
• Spin-orbit scattering in quantum diffusion of massive Dirac fermions
• Enhanced transport length of spin-helical Dirac fermions in disordered 3D topological insulators
• Low temperature saturation of phase coherence length in topological insulators
• Tunable inverse topological heterostructure utilizing $(B{i}_{1-x}I{n}_x{)}_{2}S{e}_3$
• Direct observation of decoupled Dirac states at the interface between topological and normal insulators
• Field-effect mobility enhanced by tuning the Fermi level into the band gap of Bi2Se3
• Thin film growth of a topological crystal insulator SnTe on the CdTe (111) surface by molecular beam epitaxy
• Signatures of long-range-correlated disorder in the magnetotransport of ultrathin topological insulators
• Experimental Proof of Universal Conductance Fluctuation in Quasi-1D Epitaxial Bi${}_2$Se${}_3$ Wires
• Interaction and disorder effects in 3D topological insulator thin films
• Quantum Transport and Potential of Topological States for Thermoelectricity in Bi${}_2$Te${}_3$ Thin Films
• Gate voltage controlled electronic transport through a ferromagnet/normal/ferromagnet junction on the surface of a topological insulator
• The noncommutative Kubo Formula: Applications to Transport in Disordered Topological Insulators with and without Magnetic Fields
• Controlled MOCVD growth of Bi2Se3 topological insulator nanoribbons
• Weak Antilocalization and Universal Conductance Fluctuations in Bismuth Telluro-Sulfide Topological Insulators
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• Indications of the topological transport by the universal conductance fluctuations in the Bi2Te2Se microflakes
• Disentangling surface and bulk transport in topological-insulator $p$-$n$ junctions
• Gate tunable spin-orbit coupling and weak antilocalization effect in an epitaxial La${}_{2/3}$Sr${}_{1/3}$MnO${}_3$ thin film
• Weak antilocalization in (111) thin films of a topological crystalline insulator SnTe
• Topological Effects on the Magnetoconductivity in Topological Insulators
• Shubnikov-de Haas oscillations in p and n-type topological insulator (Bi${}_x$Sb${}_{1-x}$)${}_2$Te${}_3$
• Charge puddles in a completely compensated topological insulator
• Phase-coherent transport in catalyst-free vapor phase deposited Bi${}_2$Se${}_3$ crystals
• Universal conductance fluctuations and direct observation of crossover of symmetry classes in topological insulators
• Spatially varying electronic dephasing in three dimensional topological insulators
• Modified electrical transport probe design for standard magnetometer
• Effects of surface-bulk hybridization in 3D topological `metals'
• Imaging topologically protected transport with quantum degenerate gases
• Substrate-Independent Catalyst-Free Synthesis of High-Purity Bi2Se3 Nanostructures
• Quantum corrections to the magnetoconductivity of surface states in three-dimensional topological insulators
• Ambipolar surface state transport in non-metallic stoichiometric Bi${}_2$Se${}_3$ crystals
• Switchable quantized conductance in topological insulators revealed by the Shockley-Ramo theorem
• Weak antilocalization beyond the fully diffusive regime in Pb1-xSnxSe topological quantum wells
• Magnetic field-dependent resistance crossover and logarithmic to non-saturating magnetoresistance in topological insulator Bi${}_2$Te${}_3$
• Superconducting Quantum Interference Devices Made of Sb-doped Bi2Se3 Topological Insulator Nanoribbons
• Robust Gapless Surface State against Surface Magnetic Impurities on (Bi${}_{0.5}$Sb${}_{0.5}$)${}_2$Te${}_3$ Evidenced by In Situ Magnetotransport Measurements
• Transport in topological insulators with bulk-surface coupling: Interference corrections and conductance fluctuations
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• Evidence of decoupling of surface and bulk states in Dirac semimetal $C{d}_{3}A{s}_2$
• In-depth Analysis of Anisotropic Magnetoconductance in Bi${}_2$Se${}_3$ thin films with electron-electron interaction corrections
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• Anomalous Temperature Dependence of Quantum Correction to the Conductivity of Magnetic Topological Insulators
• Designer topological insulator with enhanced gap and suppressed bulk conduction in Bi2Se3/Sb2Te3 ultra-short period superlattices
• Entanglement Chern number for three-dimensional topological insulators: Characterization by Weyl points of entanglement Hamiltonians
• Thickness dependence of electron-electron interactions in topological p-n junctions
• From classical to quantum regime of topological surface states via defect engineering
• A thermodynamic measure of the Magneto-electric coupling in the 3D topological insulator
• Observation of the surface hybridization gap in the electrical transport properties of the ultrathin topological insulator (Bi${}_{1-x}$Sb${}_x$)${}_2$Te${}_3$
• Bi${}_2$Se${}_3$ thin films heteroepitaxially grown on $\alpha$-RuCl${}_3$
• A Green's function approach to Topological Insulator junctions with magnetic and superconducting regions
• Accessing topological surface states and negative MR in sculpted nanowires of Bi2Te3 at ultra-low temperature
• Weak antilocalization in partially relaxed 200-nm HgTe films
• Topological delocalization and tuning of surface channel separation in Bi2Se2Te Topological Insulator Thin films
• Topological surface states hybridized with bulk states of Bi-doped PbSb2Te4 revealed in quasiparticle interference
• Quantum Coherent Transport of 1D ballistic states in second order topological insulator Bi${}_4$Br${}_4$
• Carrier Density and Thickness Dependent Proximity Effect in Doped Topological Insulator -- Metallic Ferromagnet Bilayers
• Electron transport properties of a narrow-bandgap semiconductor Bi${}_2$O${}_2$Te nanosheet
• Gate Tunable Relativistic Mass and Berry${}^{\prime }$s phase in Topological Insulator Nanoribbon Field Effect Devices
• Structural and transport properties of 4f electron doped Y1-x(Dy)xPdBi topological semi-metallic thin films
• Surface-bulk coupling in a Bi${}_2$Te${}_3$ nanoplate grown by van der Waals epitaxy
• Charge qubits based on ultra-thin topological insulator films
• Spin Hall and Edelstein effects in a ballistic quantum dot with Rashba spin-orbit coupling
• Fabrication and Characterization of Superconducting Quantum Interference Device using (Bi_{1-x}Sb_x)_2Se_3 Topological Insulator Nanoribbons
• Gate-tunable anomalous Hall effect in stacked van der Waals ferromagnetic insulator - topological insulator heterostructures
• Phase-coherent loops in selectively-grown topological insulator nanoribbons
• Gating of Au-$B{i}_{2}S{e}_3$-NbN ramp-type junctions with superconducting NbN gate-electrode and $SrTi{O}_3$ film as the gate-insulator