Development of an ion beam alignment system for real-time scanning tunneling microscope observation of dopant-ion irradiation

Takefumi Kamioka, Kou Sato, Yutaka Kazama, Takanobu Watanabe, Iwao Ohdomari

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    Abstract

    An ion beam alignment system has been developed in order to realize real-time scanning tunneling microscope (STM) observation of "dopant-ion" irradiation that has been difficult due to the low emission intensity of the liquid-metal-ion-source (LMIS) containing dopant atoms. The alignment system is installed in our original ion gun and STM combined system (IG/STM) which is used for in situ STM observation during ion irradiation. By using an absorbed electron image unit and a dummy sample, ion beam alignment operation is drastically simplified and accurized. We demonstrate that sequential STM images during phosphorus-ion irradiation are successfully obtained for sample surfaces of Si(111) -7 × 7 at room temperature and a high temperature of 500 °C. The LMIS-IG/STM equipped with the developed ion beam alignment system would be a powerful tool for microscopic investigation of the dynamic processes of ion irradiation.

    Original languageEnglish
    Article number073707
    JournalReview of Scientific Instruments
    Volume79
    Issue number7
    DOIs
    Publication statusPublished - 2008

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    ASJC Scopus subject areas

    • Instrumentation
    • Physics and Astronomy (miscellaneous)

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