Atomic scale observation of domain boundaries on c(2 × 2) Fe(001) thin film surfaces

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

研究成果: Article査読

5 被引用数 (Scopus)


Scanning tunneling microscopy (STM) measurements reveal that Fe thin films epitaxially grown on a MgO(001) substrate under appropriate conditions have an atomic step-terrace surface with a c(2 × 2) surface reconstruction, and that this surface is often accompanied by line-like patterns along the Fe〈110〉 direction. We have investigated the electronic properties of the patterns in detail by atomically resolved STM. We found that the pattern is a domain phase boundary of the c(2 × 2) domains, and that the domain boundaries consist of atoms exhibiting a (1 × 1) structure. The STM image shows remarkable bias-voltage dependency as indicated by the contrast inversion between the patterns and c(2 × 2) domains as the polarity of the applied bias-voltage is changed, and the contrast achieved its maximum value at +0.2 V. This bias-voltage dependency of the patterns can be explained by the existence of surface states which are observed at around 0.2 eV above the Fermi level on the Fe(001) (1 × 1) surface and 0.4 eV on the c(2 × 2) domains.

ジャーナルJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
7 B
出版ステータスPublished - 2002 7

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)


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