Scanning tunneling spectroscopy of c(2×2) reconstructed Fe thin-film surfaces

Hirofumi Oka, Agus Subagyo, Makoto Sawamura, Kazuhisa Sueoka, Koichi Mukasa

研究成果: Article査読

13 被引用数 (Scopus)


Fe thin films with flat surfaces are obtained on a MgO(001) substrate at a growth temperature of 550 K. The surfaces with atomically flat and wide terraces exhibit a c(2×2) reconstructed structure. To evaluate the effect of impurity atoms at the surface on the surface structures, scanning tunneling spectroscopy (STS), reflection high energy electron diffraction (RHEED) and X-ray photoelectron spectroscopy (XPS) studies were performed. The differential conductivity (dI/dV) spectrum of the c(2×2) Fe(001) thin-film surfaces indicates an intense peak at the sample bias voltage of 0.4 V. Since there is no clear evidence of impurity adatoms forming such a surface structure, we expect that the topmost atoms are Fe, and that the observed peak originates from surface states.

ジャーナルJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
6 B
出版ステータスPublished - 2001 6月

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)


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