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

Bianchi, M.; Song, F.; Cooil, S.; Monsen, A. F.; Wahlstrom, E.; Miwa, J. A.; Rienks, E. D. L.; Evans, D. A.; Strozecka, A. and Pascual, J. I., et al. (2015) In Physical Review B (Condensed Matter and Materials Physics) 91(16).
Abstract
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... (More)
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. (Less)
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publication status
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Physical Review B (Condensed Matter and Materials Physics)
volume
91
issue
16
publisher
American Physical Society
external identifiers
  • wos:000353205700004
  • scopus:84929208065
ISSN
1098-0121
DOI
10.1103/PhysRevB.91.165307
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English
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yes
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2015-05-19 09:36:15
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@article{3dc22d2b-662d-4ad7-bb8f-1dad656f9e62,
  abstract     = {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.},
  articleno    = {165307},
  author       = {Bianchi, M. and Song, F. and Cooil, S. and Monsen, A. F. and Wahlstrom, E. and Miwa, J. A. and Rienks, E. D. L. and Evans, D. A. and Strozecka, A. and Pascual, J. I. and Leandersson, Mats and Thiagarajan, Balasubramanian and Hofmann, Ph. and Wells, J. W.},
  issn         = {1098-0121},
  language     = {eng},
  number       = {16},
  publisher    = {American Physical Society},
  series       = {Physical Review B (Condensed Matter and Materials Physics)},
  title        = {One-dimensional spin texture of Bi(441): Quantum spin Hall properties without a topological insulator},
  url          = {http://dx.doi.org/10.1103/PhysRevB.91.165307},
  volume       = {91},
  year         = {2015},
}