One-dimensional spin texture of Bi(441); Quantum Spin Hall properties without a topological insulator

Abstract

The high index (441) surface of bismuth has been studied using Scanning Tunnelling Microscopy (STM), Angle Resolved Photoemission Spectroscopy (APRES) and spin-resolved ARPES. The surface is strongly corrugated, exposing a regular array of (110)-like terraces. Two surface localised states are observed, both of which are linearly dispersing in one in-plane direction ($k_x$), and dispersionless in the orthogonal in-plane direction ($k_y$), and both of which have a Dirac-like crossing at $k_x$=0. Spin ARPES reveals a strong in-plane polarisation, consistent with Rashba-like spin-orbit coupling. One state has a strong out-of-plane spin component, which matches with the miscut angle, suggesting its {possible} origin as an edge-state. The electronic structure of Bi(441) has significant similarities with topological insulator surface states and is expected to support one dimensional Quantum Spin Hall-like coupled spin-charge transport properties with inhibited backscattering, without requiring a topological insulator bulk.

References in corpus (15)

• Quantum Spin Hall Effect
• Spintronics and Pseudospintronics in Graphene and Topological Insulators
• Surface States of the Topological Insulator Bi_{1-x}Sb_x
• Strong spin-orbit splitting on Bi surfaces
• Quantum Spin Hall Effect and Enhanced Magnetic Response by Spin-Orbit Coupling
• One-dimensional Topological Edge States of Bismuth Bilayers
• Well-localized edge states in two-dimensional topological insulators: ultrathin Bi films
• Two-Dimensional Topological Insulator State and Topological Phase Transition in Bilayer Graphene
• Magnetic Doping and Kondo Effect in Bi2Se3 Nanoribbons
• Non-trivial Surface-band Dispersion on Bi(111)
• Direct band structure measurement of a buried two-dimensional electron gas
• Tailoring the electronic texture of a topological insulator via its surface orientation
• A spin- and angle-resolving photoelectron spectrometer
• Excitation of coherent phonons in the one-dimensional Bi(114) surface
• Topological surface states on Bi${}_{1-x}$Sb${}_x$: Dependence on surface orientation, surface termination and stability

Cited by in corpus (6)

• Observation of one-dimensional Dirac fermions in silicon nanoribbons
• Strong-coupling charge density wave in a one-dimensional topological metal
• Strong and Weak Three-Dimensional Topological Insulators Probed by Surface Science Methods
• One-Dimensional Spin-Polarised Surface States -- A Comparison of Bi(112) with Other Vicinal Bismuth Surfaces
• Spin-polarized quasi 1D state with finite bandgap on the Bi/InSb(001) surface
• One-dimensional electronic structure of phosphorene chains