Optimum gaseous pressure for measurement of the X-ray excited scanning tunneling microscope tip current

Kouichi Tsuji, Kazuaki Wagatsuma

研究成果: Article査読

8 被引用数 (Scopus)

抄録

When X-rays irradiate a sample surface of a scanning tunneling microscope (STM), a current between the STM tip and the sample is detected. This current originates from the electron emission from the sample surface, and can be used for surface analysis. The STM tip current was amplified using gaseous molecules; however, the direct ionization of molecules in the air affected the tip current measurement at normal air pressure. It was found that the optimum gaseous pressure was near 5 kPa, where the influence of the direct ionization could be ignored, although the amplification effect still occurred.

本文言語English
ページ(範囲)1264-1267
ページ数4
ジャーナルJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
36
3 SUPPL. A
DOI
出版ステータスPublished - 1997 3月
外部発表はい

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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