Topological insulator in a Bi-Bi${}_2$Se${}_3$ infinitely adaptive superlattice phase

Abstract

We report spin- and angle-resolved photoemission studies of a topological insulator from the infinitely adaptive series between elemental Bi and Bi${}_2$Se${}_3$. The compound, based on Bi${}_4$Se${}_3$, is a 1:1 natural superlattice of alternating Bi${}_2$ layers and Bi${}_2$Se${}_3$ layers; the inclusion of S allows the growth of large crystals, with the formula Bi${}_4$Se${}_{2.6}$S${}_{0.4}$. The crystals cleave along the interfaces between the Bi${}_2$ and Bi${}_2$Se${}_3$ layers, with the surfaces obtained having alternating Bi or Se termination. The resulting terraces, observed by photoemission electron microscopy, create avenues suitable for the study of one-dimensional topological physics. The electronic structure, determined by spin- and angle- resolved photoemission spectroscopy, shows the existence of a surface state that forms a large, hexagonally shaped Fermi surface around the $\Gamma$ point of the surface Brillouin zone, with the spin structure indicating that this material is a topological insulator.

published version, 5 pages, 4 figures

References in corpus (7)

• 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
• 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
• Quantum Spin Hall Effect and Enhanced Magnetic Response by Spin-Orbit Coupling
• Direct Evidence for the Dirac-Cone Topological Surface States in Ternary Chalcogenide TlBiSe2
• Spin-orbit interaction effect in the electronic structure of \BiTe \ observed by angle-resolved photoemission spectroscopy

Cited by in corpus (20)

• Topological Insulator Materials
• Colloquium: Topological Band Theory
• Crystal Structure and Chemistry of Topological Insulators
• Quantum interference and Aharonov-Bohm oscillations in topological insulators
• $\mbox{Bi}_{1}\mbox{Te}_{1}$: a dual topological insulator
• Demonstration of surface transport in a hybrid Bi2Se3/Bi2Te3 heterostructure
• Z${}_2$ topology and superconductivity from symmetry lowering of a 3D Dirac Metal Au${}_2$Pb
• Termination dependent topological surface states of the natural superlattice phase Bi${}_4$Se${}_3$
• Ferromagnetism and Spin-dependent Transport in n-type Mn-Bi2Te3 Thin Films
• Engineering three-dimensional topological insulators in Rashba-type spin-orbit coupled heterostructures
• Weak topological insulators induced by the inter-layer coupling: A first-principles study of stacked Bi2TeI
• Spin-Orbit Logic with Magnetoelectric Nodes: A Scalable Charge Mediated Nonvolatile Spintronic Logic
• Vibrational Spectra of Pb2Bi2Te3, PbBi2Te4 and PbBi4Te7 Topological Insulators: Temperature Dependent Raman and Theoretical Insight from DFT Simulations
• Gapped Surface States in a Strong-Topological-Semimetal
• Nano-mosaic of Topological Dirac States on the Surface of Pb5Bi24Se41 Observed by Nano-ARPES
• Nonlinear Magneto-Optical and Magnetoelectric Phenomena in Topological Insulator Heterostructures
• Superconducting Bi2Te: pressure-induced universality in the (Bi2)m(Bi2Te3)n series
• Interfacing Quantum Spin Hall and Quantum Anomalous Hall insulators: Bi bilayer on MnBi${}_2$Te${}_4$-family materials
• Interfacial Fermi Loops from Interfacial Symmetries
• Edge bands and vertical transport in topological insulator/magnetic insulator heterostructures