走査型トンネル顕微鏡を用いた原子分解能を持つ局所ＥＳＲ測定

• 米田 忠弘

  東北大学多元物質科学研究所先端計測開発センター

書誌事項

タイトル別名

• Electron Spin Resonance Measurement with Atomic Scale Resolution using Scanning Tunneling Microscope
• ソウサガタ トンネル ケンビキョウ オ モチイタ ゲンシ ブンカイノウ オ モツ キョクショ ESR ソクテイ

抄録

We discuss the detection of a single spin by monitoring the tunneling current of the scanning tunneling microscope in the presence of a magnetic field. We have measured high frequency signals in the tunneling current of scanning tunneling microscopy for a submonolayer oxide thin film on the Si(111)-7×7 surface. We demonstrate that the signal is related to the Larmor precession of the electron spin associated with a dangling bond. The detected precession frequency possesses a broad distribution (line-width is comparable with that observed by conventional electron spin resonance) and a split near the maxima, both of which are attributed to the inhomogeneity of the g factor of a single spin. With site-specific measurement, we found that the spin signal was detected on the bright Si adatom in which oxygen atoms occupy the backbonds and weakened the metallic nature of the Si(111)-7×7 surface. The measured Larmor frequency corresponded to g∼2.00. On the other hand, no peak was detected on the dark adatom that is tied with an oxygen atom at the on-top site. This is due to the disappearance of the Si dangling bond through the chemical bond formation with the oxygen atom.

収録刊行物

• 表面科学

  表面科学 30 (6), 325-331, 2009

  公益社団法人 日本表面科学会

キーワード

• ESR
• STM
• Si oxide
• spin detection
• single molecule

詳細情報

• CRID: 1390001206457028352
• NII論文ID: 10024945861
• NII書誌ID: AN00334149
• DOI: 10.1380/jsssj.30.325
• ISSN: 18814743
• ISSN: 03885321
• NDL書誌ID: 10339037
• Web Site: http://id.ndl.go.jp/bib/10339037
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10339037
• Web Site: http://www.jstage.jst.go.jp/article/jsssj/30/6/30_6_325/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可