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

研究成果: Article査読

2 被引用数 (Scopus)


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.

ジャーナルPhysica B: Condensed Matter
出版ステータスPublished - 2018 5 1

ASJC Scopus subject areas

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

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