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Growth processes and low-dimensional physical properties on ultrathin high-k materials film fabricated on concave-convex Si surface by spectroscopic observation

Research Project

Project/Area Number 17K06030
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Device related chemistry
Research InstitutionEhime University

Principal Investigator

Kakiuchi Takuhiro  愛媛大学, 理工学研究科(理学系), 講師 (00508757)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords金属半導体ヘテロ界面 / Si半導体 / 高誘電体材料 / 光電子分光 / コインシデンス分光法 / シンクロトロン放射光 / 酸化反応ダイナミクス / 表面界面反応 / 表面化学反応 / 超薄膜 / 金属酸化物半導体電界効果トランジスタ / 二酸化ハフニウム / シリコン半導体 / 表面界面反応追跡 / 時間分解光電子分光法 / ハフニウムシリサイド / 酸化ダイナミクス / 表面界面 / 局所価電子状態 / 酸化ハフニウム超薄膜 / 光電子-オージェ電子コインシデンス分光法 / 光電子分光法 / オージェ電子分光法 / マイクロ・ナノデバイス / 高誘電率材料 / 量子閉じ込め
Outline of Final Research Achievements

In this study, we have succeeded to prepare ultrathin hafnium (Hf) films on clean Si semiconductor surfaces (Hf/Si), which are grown by a lever rule, by using electron beam heating. There some different chemical states of silicide species were observed at Hf/Si interface; such as HfSi, HfSi_2, and HfSi_4. Each of them shows individual reactivity with O_2 molecules. Therefore, the chemical states at the interface of the ultrathin Hf/Si films depend on a plane orientation, a thickness, temperature of substrate, and so on. On the other hand, metallic Hf component at surface shows high O_2 reactivity with barrier-less. Moreover, we have succeeded to reveal the different local valence electronic states at SiO_2 interface between HfO_2/SiO_2/Si and HfSi_2/SiO_2/Si samples by Auger-photoelectron coincidence spectroscopy. Our new findings will be very useful for preparing well-defined interfaces and surface structures for obtaining next generation nano materials.

Academic Significance and Societal Importance of the Research Achievements

Si半導体基板上の金属超薄膜成長を理解することは、原子混合、局所状態、反応特性、等々を解明するだけでなく、その表面界面で示す低次元物性やその応用を創生できるため非常に重要である。特に、周期表第4族に属するチタン、ジルコニウム、およびハフニウムは僅かな組成の違いによって光触媒、半導体素子、記憶媒体、セラミック、原子炉、超高真空材料などに応用される興味深い元素である。各分野で要求される特異な機能をこれらの混合試料からナノデザインできるようになれば、持続可能なエネルギー源の調達、省エネ化、デバイスの小型設計、紫外線による除菌など、緊急に解決すべき課題にブレークスルーを起こすことができる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (10 results)

All 2020 2019 2018 Other

All Int'l Joint Research (2 results) Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (6 results) (of which Int'l Joint Research: 1 results)

  • [Int'l Joint Research] Helmholz Zentrum Berlin(ドイツ)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] Hermholz Zentrum Berlin, Bessy-II(Germany)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Initial oxidation processes of ultrathin hafnium film and hafnium disilicide islands on Si(100)-2 × 1 surfaces studied using core-level X-ray photoelectron spectroscopy2020

    • Author(s)
      Takuhiro Kakiuchi、Hideki Yamasaki、Chie Tsukada、Akitaka Yoshigoe
    • Journal Title

      Surface Science

      Volume: 693 Pages: 121551-121551

    • DOI

      10.1016/j.susc.2019.121551

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Local valence electronic states of silicon (sub)oxides on HfO_(2)/Si-(sub)oxide/Si(110) and HfSi_(2)/Si-(sub)oxide/Si(110) Islands2019

    • Author(s)
      Takuhiro Kakiuchi, Kyouhei Ikeda, Kazuhiko Mase, Shin-ichi Nagaoka
    • Journal Title

      Surface Science

      Volume: 681 Pages: 9-17

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] Initial oxidation process of ultrathin hafnium film on Si(111) surface studied by Hf 4f, Si 2p, and O 1s core-level spectroscopy2019

    • Author(s)
      Takuhiro Kakiuchi, Daisuke Koyama, Akitaka Yoshigoe
    • Organizer
      日本表面真空学会学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] HfO2/Si超薄膜からのハフニウムジシリサイド形成とその表面局所電子状態2019

    • Author(s)
      垣内拓大、小山大輔、間瀬一彦
    • Organizer
      2018年度量子ビームサイエンスフェスタ
    • Related Report
      2018 Research-status Report
  • [Presentation] Si-(sub)oxides selective local valence electronic states of HfSi_(2)/Si-(sub)oxides/Si(110) and HfO_(2)/Si-(sub)oxides/Si(110)2018

    • Author(s)
      Takuhiro Kakiuchi, Kyohei Ikeda, Kazuhiko Mase, Shin-ichi Nagaoka
    • Organizer
      The International Conference on Many Particle Spectroscopy of Atoms, Molecules, Clusters and Surfaces
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Si(100)-2×1清浄表面に作製したハフニウム超薄膜の酸素吸着と脱離2018

    • Author(s)
      垣内拓大、山崎英輝、塚田千恵、吉越章隆
    • Organizer
      第12回分子科学討論会2018福岡
    • Related Report
      2018 Research-status Report
  • [Presentation] Influence of hafnium chemical state difference on initial silicon oxidation at interface between hafnium deposition and Si(100) substrate2018

    • Author(s)
      Takuhiro Kakiuchi, Hideki Yamasaki, Chie Tsukada, Akitaka Yoshigoe
    • Organizer
      2018年日本表面真空学会学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] Thickness Dependency of Local Valence Electronic State at Surface/Interface of Ultrathin HfSi2/Si(110) Film2018

    • Author(s)
      Daisuke Koyama, Masahiro Yamasaki, Takuhiro Kakiuchi, Shin-ichi Nagaoka, Kazuhiko Mase
    • Organizer
      日本化学会 第98春季年会 (2018)
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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