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Open Access Publications from the University of California

Surface structure of in situ cleaved single crystal Bi2Se3 measured by low energy ion scattering

  • Author(s): Zhou, W
  • Zhu, H
  • Yarmoff, JA
  • et al.

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© 2016 American Vacuum Society. Bismuth selenide is a two-dimensional topological insulator material composed of stacked quintuple layers (QL). The layers are held together by a weak van der Waals force that enables surface preparation by cleaving. Low energy ion scattering experiments show that Bi2Se3 cleaved under ultrahigh vacuum has a Se-terminated structure that is consistent with cleaving between QLs. Comparison of experimental data to molecular dynamics simulations confirms the Se-termination and provides an estimate of the surface relaxation.

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