One-dimensional spin texture of Bi(441); Quantum Spin Hall properties without a topological insulator
| Autor: | S. P. Cooil, Justin W. Wells, Anna Stróżecka, Marco Bianchi, Thiagarajan Balasubramanian, Erik Wahlström, Jill A. Miwa, A. F. Monsen, Ph. Hofmann, M. Leandersson, Fei Song, Jose Ignacio Pascual, E. D. L. Rienks, D. A. Evans |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Materials science
SURFACE BISMUTH THIN-FILMS FOS: Physical sciences chemistry.chemical_element Angle-resolved photoemission spectroscopy Electronic structure law.invention Bismuth NANORIBBONS law Condensed Matter::Superconductivity Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Spin (physics) Surface states Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter Physics Polarization (waves) BI2SE3 Electronic Optical and Magnetic Materials ELECTRONIC-STRUCTURE chemistry STATES Topological insulator Condensed Matter::Strongly Correlated Electrons Scanning tunneling microscope |
| Zdroj: | Bianchi, M, Song, F, Cooil, S, Monsen, A F, Wahlstrom, E, Miwa, J A, Rienks, E D L, Evans, D A, Strozecka, A, Pascual, J I, Leandersson, M, Balasubramanian, T, Hofmann, P & Wells, J W 2015, ' One-dimensional spin texture of Bi(441) : Quantum spin Hall properties without a topological insulator ', Physical Review B, vol. 91, no. 16, 165307 . https://doi.org/10.1103/PhysRevB.91.165307 |
| DOI: | 10.1103/PhysRevB.91.165307 |
| Popis: | The high index (441) surface of bismuth has been studied using scanning tunneling 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 localized 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 polarization, 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. |
| Databáze: | OpenAIRE |
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