Topological Surface States and Dirac point tuning in ternary Bi2Te2Se class of topological insulators

Abstract

Using angle-resolved photoemission spectroscopy, we report electronic structure for representative members of ternary topological insulators. We show that several members of this family, such as Bi2Se2Te, Bi2Te2Se, and GeBi2Te4, exhibit a singly degenerate Dirac-like surface state, while Bi2Se2S is a fully gapped insulator with no measurable surface state. One of these compounds, Bi2Se2Te, shows tunable surface state dispersion upon its electronic alloying with Sb (SbxBi2-xSe2Te series). Other members of the ternary family such as GeBi2Te4 and BiTe1.5S1.5 show an in-gap surface Dirac point, the former of which has been predicted to show nonzero weak topological invariants such as (1;111); thus belonging to a different topological class than BiTe1.5S1.5. The measured band structure presented here will be a valuable guide for interpreting transport, thermoelectric, and thermopower measurements on these compounds. The unique surface band topology observed in these compounds contributes towards identifying designer materials with desired flexibility needed for thermoelectric and spintronic device fabrication.

9 pages, 6 figures; Related results at http://online.kitp.ucsb.edu/online/topomat11/hasan/

References in corpus (25)

• Topological Insulators
• Topological insulators and superconductors
• Topological Insulators in Three Dimensions
• Topological Insulators with Inversion Symmetry
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
• Quantized Anomalous Hall Effect in Magnetic Topological Insulators
• First observation of Spin-Momentum Helical Locking in Bi2Se3 and Bi2Te3, demonstration of Topological-Order at 300K and a realization of topological-transport-regime
• First direct observation of Spin-textures in Topological Insulators : Spin-resolved ARPES as a probe of topological quantum spin Hall effect and Berry's phase
• Topological Surface States Protected From Backscattering by Chiral Spin Texture
• Seeing the magnetic monopole through the mirror of topological surface states
• Magnetoelectric polarizability and axion electrodynamics in crystalline insulators
• Hexagonal Warping Effects in the Surface States of Topological Insulator Bi${}_2$Te${}_3$
• Large bulk resistivity and surface quantum oscillations in the topological insulator Bi2Te2Se
• p-type Bi2Se3 for topological insulator and low temperature thermoelectric applications
• Probing Neutral Majorana Fermion Edge Modes with Charge Transport
• Unconventional superconductivity on a topological insulator
• Helical Metal Inside a Topological Band Insulator
• Inverse Spin-Galvanic Effect in a Topological-Insulator/Ferromagnet Interface
• Ambipolar Field Effect in Topological Insulator Nanoplates of (BixSb1-x)2Te3
• In-plane transport and enhanced thermoelectric performance in thin films of the topological insulators Bi_2Te_3 and Bi_2Se_3
• Low carrier concentration crystals of the topological insulator Bi${}_2$Te${}_2$Se
• Ternary Tetradymite Compounds as Topological Insulators
• Direct Observation of the Topological Surface States in Lead-Based Ternary Telluride Pb(Bi1-xSbx)2Te4
• An isolated Dirac cone on the surface of ternary tetradymite-like topological insulators

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• A topological crystalline insulator (TCI) phase via topological phase transition and crystalline mirror symmetry
• Experimental realization of an intrinsic magnetic topological insulator
• Observation of topological surface state quantum Hall effect in an intrinsic three-dimensional topological insulator
• Crystal Structure and Chemistry of Topological Insulators
• Topological quantum materials from the viewpoint of chemistry
• Topological insulators and thermoelectric materials
• Surface states and Rashba-type spin polarization in antiferromagnetic MnBi${}_2$Te${}_4$
• Observation of Quantum-Tunneling Modulated Spin Texture in Ultrathin Topological Insulator Bi2Se3 Films
• A Novel Quasi-One-Dimensional Topological Insulator in Bismuth Iodide $\beta$-Bi${}_4$I${}_4$
• Emerging Weak Localization Effects on Topological Insulator-Insulating Ferromagnet (Bi_2Se_3-EuS) Interface
• 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
• Optical properties of Bi2Te2Se at ambient and high pressure
• Gigantic surface life-time of an intrinsic topological insulator revealed via time-resolved (pump-probe) ARPES
• Topological Surface States with Persistent High Spin Polarization across Dirac Point in Bi${}_2$Te${}_2$Se and Bi${}_2$Se${}_2$Te
• New interpretation of the origin of 2DEG states at the surface of layered topological insulators
• Evidence of surface transport and weak anti-localization in single crystal of Bi2Te2Se topological insulator
• Unoccupied Topological States on Bismuth Chalcogenides
• Observation of a Highly Spin Polarized Topological Surface State in GeBi${}_2$Te${}_4$
• Termination dependent topological surface states of the natural superlattice phase Bi${}_4$Se${}_3$
• Optical evidence of surface state suppression in Bi based topological insulators
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• Spin Hall photoconductance in a 3D topological insulator at room temperature
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• Spectroscopic realization of large surface gap in a doped magnetic topological insulator
• A Natural Topological Insulator
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• Three-dimensional topological insulators: A review on host materials
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• Band Structure of Topological Insulator BiSbTe1.25Se1.75
• Electron-Phonon Coupling and Quantum Correction to Topological Magnetoconductivity in Bi2GeTe4
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• Dirac states with knobs on: interplay of external parameters and the surface electronic properties of 3D topological insulators
• Trigger of the ubiquitous surface band bending in 3D topological insulators
• Criteria for realizing room temperature electrical transport applications of topological materials
• Unoccupied topological surface state in Bi${}_2$Te${}_2$Se
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• Topological phase transition and two dimensional topological insulators in Ge-based thin films
• Surface Versus Bulk Dirac States Tuning in a Three-Dimensional Topological Dirac Semimetal
• Topological metal behavior in GeBi2Te4 single crystals
• Gapless Topological Superconductors - Model Hamiltonian and Realization
• Landau Levels of Topologically-Protected Surface States Probed by Dual-Gated Quantum Capacitance
• Non-Dirac topological surface states in (SnTe)${}_{n\ge 2}$(Bi${}_2$Te${}_3$)${}_{m=1}$
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• Positron surface state as a spectroscopic probe for characterizing surfaces of topological insulator materials
• Engineering topological phases in triple HgTe/CdTe quantum wells
• Ionic and electronic properties of the topological insulator Bi${}_2$Te${}_2$Se investigated using $\beta$-detected nuclear magnetic relaxation and resonance of ${}^8$Li
• Highly Tunable Band Inversion in AB2X4 (A=Ge, Sn, Pb; B=As, Sb, Bi; X=Se, Te) Compounds
• Kondo screening by the surface modes of a strong topological insulator
• Landau theory of helical Fermi liquids
• Ultralow Thermal Conductivity and Thermoelectric Properties of Bi4GeTe7 with an Intrinsic van der Waal Heterostructure
• Controlling and distinguishing electronic transport of topological and trivial surface states in a topological insulator
• Disordered topological metals
• Universal superconductivity phase diagram for pressurized tetradymite topological insulators
• Superconductivity by alloying the topological insulator SnBi2Te4
• Ab initio study of nontrivial topological phases in corundum structured $($M${}_2$O${}_3)/($Al${}_2$O${}_3{)}_5$ multilayers
• Evidence for a New Excitation at the Interface Between a High-Tc Superconductor and a Topological Insulator
• Topological field-effect transistor with quantized ON/OFF conductance of helical/chiral dislocation states
• Transport through a disordered topological-metal strip
• Kinetic limitation of chemical ordering in Bi${}_2$Te${}_{3-x}$Se${}_x$ layers grown by molecular beam epitaxy
• Micro-metric electronic patterning of a topological band structure using a photon beam
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• Growth of bilayer stanene on a magnetic topological insulator aided by a buffer layer
• Reducing the impact of bulk doping on transport properties of Bi-based 3D topological insulators
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• Thermodynamic and electrical transport properties of the half-Heusler plumbide TbAuPb