Atomic-dipole-moment induced local surface potential on Si(111)-(7 × 7) surface studied by non-contact scanning nonlinear dielectric microscopy

Kohei Yamasue, Masayuki Abe, Yoshiaki Sugimoto, Yasuo Cho

研究成果: Article査読

4 被引用数 (Scopus)

抄録

We have performed the site-specific, quantitative measurement of a local surface potential induced by atomic dipoles on a Si(111)-(7 × 7) surface by non-contact scanning nonlinear dielectric microscopy (NC-SNDM) combined with an atom-tracking technique. The measured potentials were quantitatively consistent with those estimated by a simultaneous measurement of the tunneling current, which validates a previously proposed hypothetical mechanism that explains the unexpected resemblance between the dipole and time-averaged tunneling current images in NC-SNDM imaging. The results show that an asymmetry arising in the current-voltage characteristics within the tunneling regime is governed by the local surface potential induced by atomic dipoles.

本文言語English
論文番号121601
ジャーナルApplied Physics Letters
105
12
DOI
出版ステータスPublished - 2014 9 22

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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