Spin-Polarized Surface Resonances Accompanying Topological Surface State Formation

Abstract

Topological insulators host spin-polarized surface states born out of the energetic inversion of bulk bands driven by the spin-orbit interaction. Here we discover previously unidentified consequences of band-inversion on the surface electronic structure of the topological insulator Bi${}_2$Se${}_3$. By performing simultaneous spin, time, and angle-resolved photoemission spectroscopy, we map the spin-polarized unoccupied electronic structure and identify a surface resonance which is distinct from the topological surface state, yet shares a similar spin- orbital texture with opposite orientation. Its momentum- dependence and spin texture imply an intimate connection with the topological surface state. Calculations show these two distinct states can emerge from trivial Rashba-like states that change topology through the spin-orbit-induced band inversion. This work thus provides a compelling view of the coevolution of surface states through a topological phase transition, enabled by the unique capability of directly measuring the spin-polarized unoccupied band structure.

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Cited by in corpus (45)

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• Angle-resolved photoemission spectroscopy and its application to topological materials
• Multiple topological states in iron-based superconductors
• Time- and Angle-Resolved Photoemission Studies of Quantum Materials
• Angle-resolved photoemission spectroscopy
• Observation of spin-momentum locked surface states in amorphous Bi${}_2$Se${}_3$
• Band resolved imaging of photocurrent in a topological insulator
• Orbital Complexity in Intrinsic Magnetic Topological Insulators MnBi${}_4$Te${}_7$ and MnBi${}_6$Te${}_{10}$
• Computational Framework for Angle-Resolved Photoemission Spectroscopy
• Theoretical Understanding of Photon Spectroscopies in Correlated Materials In and Out of Equilibrium
• Chiral Spin Mode on the Surface of a Topological Insulator
• Sub-picosecond spin dynamics of excited states in the topological insulator Bi${}_2$Te${}_3$
• Origins of electronic bands in antiferromagnetic topological insulator MnBi${}_2$Te${}_4$
• Polarization-Modulated Angle-Resolved Photoemission Spectroscopy: Towards Circular Dichroism without Circular Photons and Bloch Wavefunction Reconstruction
• Orbital Fingerprint of Topological Fermi Arcs in a Weyl Semimetal
• Advancing time- and angle-resolved photoemission spectroscopy: The role of ultrafast laser development
• Visualizing dispersive features in 2D image via minimum gradient method
• Quadrupole spin polarization as signature of second-order topological superconductors
• Emergent vortex Majorana zero mode in iron-based superconductors
• Monolayer superconductivity and tunable topological electronic structure at the Fe(Te,Se)/Bi2Te3 interface
• A general route to form topologically-protected surface and bulk Dirac fermions along high-symmetry lines
• Floquet engineering of topological phase transitions in quantum spin Hall $\alpha$-$T_3$ system
• Time-, spin-, and angle-resolved photoemission spectroscopy with a 1-MHz 10.7-eV pulse laser
• Impact of ultrafast transport on the high-energy states of a photoexcited topological insulator
• Role of matrix elements in the time-resolved photoemission signal
• Ultrafast Hidden Spin Polarization Dynamics of Bright and Dark Excitons in 2H-WSe${}_2$
• Ultrafast Evolution of Bulk, Surface and Surface Resonance States in Photoexcited Bi${}_2$Te${}_3$
• Efficient Prediction of Time- and Angle-Resolved Photoemission Spectroscopy Measurements on a Non-Equilibrium BCS Superconductor
• Ultrafast dynamics of photocurrents in surface states of 3D topological insulators
• Majorana bound states in topological insulators with hidden Dirac points
• Spin-polarization of topological crystalline and normal insulator Pb${}_{1-x}$Sn${}_x$Se (111) epilayers probed by photoelectron spectroscopy
• Development of a Laser-based angle-resolved-photoemission spectrometer with sub-micrometer spatial resolution and high-efficiency spin detection
• Propagation, dissipation and breakdown in quantum anomalous Hall edge states probed by microwave edge plasmons
• Light-field dressing of transient photo-excited states above $E_F$
• Spectroscopic evidence for a new type of surface resonance at noble metal surfaces
• Selective observation of surface and bulk bands in polar WTe2 by laser-based spin- and angle-resolved photoemission spectroscopy
• Analysis methodology of coherent oscillations in time- and angle-resolved photoemission spectroscopy
• Detecting winding and Chern numbers in topological matter using spectral function
• Altermagnetic Metal-Organic Frameworks
• Nonequilibrium topological spin textures in momentum space
• Topological spin textures in electronic non-Hermitian systems
• Control of intervalley scattering in Bi${}_2$Te${}_3$ via temperature-dependent band renormalization
• Surface spectroscopy and surface-bulk hybridization of Weyl semimetals
• Evolution of the intertwining correlated topological phases in iron-based superconductor Fe(Te,Se)
• Floquet spin textures in optically pumped non-Hermitian surface states