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Scientific article
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English

Spin- and angle-resolved photoemission spectroscopy study of heptahelicene layers on Cu(111) surfaces

Published inThe Journal of chemical physics, vol. 159, no. 4, 044701
Publication date2023-07-28
First online date2023-07-24
Abstract

It has been demonstrated previously that electrons interact differently with chiral molecules depending on their polarization. For enantiomeric pure monolayers of heptahelicene, opposite asymmetries in spin polarization were reported and attributed to the so-called chirality-induced spin selectivity effect. However, these promising proof-of-concept photoemission experiments lack the angular and energy resolution that could provide the necessary insights into the mechanism of this phenomenon. In order to fill in the missing gaps, we provide a detailed spin- and angle-resolved photoemission spectroscopy study of heptahelicene layers on a Cu(111) substrate. Throughout the large accessible energy and angle range, no chirality induced spin asymmetry in photoemission could be observed. Possible reasons for the absence of signatures of the spin-dependent electron transmission through the chiral molecular layer are briefly discussed.

eng
Keywords
  • Spintronics
  • Surface states
  • Electron diffraction
  • Angle-resolved photoemission spectroscopy
  • Chirality
  • Ultraviolet photoelectron spectroscopy
Research group
Citation (ISO format)
BALJOZOVIĆ, M. et al. Spin- and angle-resolved photoemission spectroscopy study of heptahelicene layers on Cu(111) surfaces. In: The Journal of chemical physics, 2023, vol. 159, n° 4, p. 044701. doi: 10.1063/5.0156581
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ISSN of the journal0021-9606
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Creation08/07/2023 8:11:52 PM
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