Surface electronic structure of SmB6(111)

Yoshiyuki Ohtsubo, Kenta Hagiwara, Chengwei Wang, Ryu Yukawa, Koji Horiba, Hiroshi Kumigashira, Wataru Hirano, Fumitoshi Iga, Shin ichi Kimura

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Samarium hexaboride (SmB6) is the most extensively studied candidate of topological Kondo insulators. To clarify the topological origin of metallic surface states observed on the SmB6(001) surfaces, we studied the surface electronic structure of SmB6 on the other surface orientation, SmB6(111). Although the SmB6(111) surface cannot be obtained by cleaving, we successfully obtained the well-defined clean surface by high-temperature annealing of the mechanically polished single crystal of SmB6(111) in an ultra-high vacuum. The valence band spectra obtained by photoelectron spectroscopy with the bulk and surface-sensitive incident photon energies imply that the surface is covered with B6 cluster without Sm atoms.

Original languageEnglish
Pages (from-to)75-77
Number of pages3
JournalPhysica B: Condensed Matter
Volume536
DOIs
Publication statusPublished - 2018 May 1
Externally publishedYes

Keywords

  • PES
  • SmB(111)
  • Topological Kondo Insulator

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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  • Cite this

    Ohtsubo, Y., Hagiwara, K., Wang, C., Yukawa, R., Horiba, K., Kumigashira, H., Hirano, W., Iga, F., & Kimura, S. I. (2018). Surface electronic structure of SmB6(111). Physica B: Condensed Matter, 536, 75-77. https://doi.org/10.1016/j.physb.2017.09.033