Direct observation of the spin polarization in Au atomic wires on Si(553)

H. W. Yeom, S. W. Jung, J. S. Shin, J. Kim, K. S. Kim, K. Miyamoto, T. Okuda, H. Namatame, A. Kimura, M. Taniguchi

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19 Citations (Scopus)


The spin-resolved electronic band structure of Au-induced metallic atomic wires on a vicinal silicon surface, Si(553), was investigated using spin- and angle-resolved photoelectron spectroscopy. We directly measured the spin polarization of three partially filled one-dimensional metallic bands, a one-third-filled band, and the doublet of nearly half-filled bands. For the half-filled doublet, the strong apparent spin polarization was observed near the Fermi energy with a minor out-of-plane spin component. This observation is consistent with the Rashba-type spin-orbit splitting and with a recent experiment on a similar doublet of Si(557)-Au. In contrast, the one-third-filled band does not show a substantial spin polarization within the experimental accuracy, indicating a much smaller spin splitting, if any. These results are discussed for the origin of the partially filled bands and for the intriguing broken-symmetry ground state observed at low temperature.

Original languageEnglish
Article number093030
JournalNew Journal of Physics
Publication statusPublished - 2014 Sept 23

Bibliographical note

Publisher Copyright:
© 2014 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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