Anomalous dressing of Dirac fermions in the topological surface state of Bi2Se3, Bi2Te3, and CuxBi2Se3

Abstract

Quasiparticle dynamics on the topological surface state of Bi2Se3, Bi2Te3, and superconducting CuxBi2Se3 are studied by 7 eV laser-based angle resolved photoemission spectroscopy. We find strong mode-couplings in the Dirac-cone surface states at energies of ~3 and ~15-20 meV, which leads to an exceptionally large coupling constant of ~3, which is one of the strongest ever reported for any material. This result is compatible with the recent observation of a strong Kohn anomaly in the surface phonon dispersion of Bi2Se3, but it appears that the theoretically proposed "spin-plasmon" excitations realized in helical metals are also playing an important role. Intriguingly, the ~3 meV mode coupling is found to be enhanced in the superconducting state of CuxBi2Se3.

5 pages, 4 figures

References in corpus (12)

• The electronic properties of graphene
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Topological Field Theory of Time-Reversal Invariant Insulators
• Strong spin-orbit splitting on Bi surfaces
• Coexistence of the topological state and a two-dimensional electron gas on the surface of Bi2Se3
• Giant Phonon-induced Conductance in Scanning Tunneling Spectroscopy of Gate-tunable Graphene
• First Principles Studies on 3-Dimentional Strong Topological Insulators: Bi2Te3, Bi2Se3 and Sb2Te3
• Bulk superconducting phase with a full energy gap in the doped topological insulator Cu_xBi_2Se_3
• Momentum-Resolved Landau-Level Spectroscopy of Dirac Surface State in Bi2Se3
• Electron-phonon Coupling on the Surface of the Topological Insulator Bi2Se3: Determined from Surface Phonon Dispersion Measurements
• Electrochemical synthesis and superconducting phase diagram of Cu_xBi2Se3
• Anomalous suppression of the superfluid density in the CuxBi2Se3 superconductor upon progressive Cu intercalation

Cited by in corpus (40)

• Topological Insulator Materials
• Dirac materials
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• Dirac and Weyl Superconductors in Three Dimensions
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• Distinguishing bulk and surface electron-phonon coupling in the topological insulator Bi2Se3 using time-resolved photoemission spectroscopy
• 3D nature of ZrTe${}_5$ band structure measured by high-momentum-resolution photoemission spectroscopy
• High-Resolution Faraday Rotation and Electron-Phonon Coupling in Surface States of the Bulk-Insulating Topological Insulator Cu${}_{0.02}$Bi${}_2$Se${}_3$
• Optical evidence of surface state suppression in Bi based topological insulators
• Surface vibrational modes of the topological insulator Bi${}_2$Se${}_3$ observed by Raman spectroscopy
• Surface collective modes in the topological insulators Bi${}_2$Se${}_3$ and Bi${}_{0.5}$Sb${}_{1.5}$Te${}_{3-x}$Se${}_x$
• Electron-Phonon Coupling and Surface Debye Temperature of Bi${}_2$Te${}_3$(111) from Helium Atom Scattering
• Anomalous Acoustic Plasmon Mode from Topologically Protected States
• Fermion-boson many-body interplay in a frustrated kagome paramagnet
• Low-Temperature and High-Energy-Resolution Laser Photoemission Spectroscopy
• Chiral Spin Mode on the Surface of a Topological Insulator
• Optical phonon dynamics and electronic fluctuations in the Dirac semimetal Cd3As2
• Electron-phonon interaction on the surface of a 3D topological insulator
• Dependence of superconductivity in CuxBi2Se3 on quenching conditions
• Electronic structure of the candidate 2D Dirac semimetal SrMnSb2: a combined experimental and theoretical study
• Nanoscale Surface Dynamics of Bi${}_2$Te${}_3$(111): Observation of a Prominent Surface Acoustic Wave and the Role of van der Waals Interactions
• Superconductivity in Dense Rashba Semiconductor BiTeCl
• THz Surface Modes and Electron-Phonon Coupling in Bi${}_2$Se${}_3$(111)
• Connecting electron and phonon spectroscopy data to consistently determine quasiparticle-phonon coupling on the surface of topological insulators
• Persistent Coherence and Spin-Polarization of Topological Surface States on Topological Insulators
• Conductivity of Dirac fermions with phonon induced topological crossover
• Doping-dependent charge dynamics in CuxBi2Se3
• Observation of antiphase coherent phonons in the warped Dirac cone of Bi${}_2$Te${}_3$
• Nanoscale Determination of the Mass Enhancement Factor in the Lightly-Doped Bulk Insulator Lead Selenide
• Robust Fabry-Perot interference in dual-gated Bi${}_2$Se${}_3$ devices
• Superconductivity and Quantum Oscillations in Single Crystals of the Compensated Semimetal CaSb${}_2$
• Strong interplay between electron-phonon interaction and disorder in low doped systems
• Electron-phonon Coupling and Kohn Anomaly due to the Floating 2D Electronic Bands on the Surface of ZrSiS
• Phase diagram and phonon-induced backscattering in topological insulator nanowires
• The anomalous spin texture as the probe for interactions in $B{i}_{2-y}S{b}_{y}S{e}_{x}T{e}_{3-x}$
• Phonon and defect mediated quantum anomalous Hall insulator to metal transition in magnetically doped topological insulators
• Electron-Phonon Coupling on the Surface of Topological Insulators
• Cyclotron Resonance in Topological Insulators: Non-Relativistic Effects
• Magnetic impurities make superconductivity in 3D Dirac semi-metal triplet
• Evidence for atomic-scale vibron-mediated electron bunching