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AC stability of metal single-atom contacts

Research Project

Project/Area Number 26390028
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Nanomaterials engineering
Research InstitutionKyoto University

Principal Investigator

Sakai Akira  京都大学, 工学研究科, 教授 (80143543)

Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords金属単原子接点 / 接点安定性 / 交流安定性 / エレクトロマイグレーション / 接点寿命 / 金属ナノワイヤ / コンダクタンス / 単原子接点 / 高バイアス安定性 / 交流破断電圧
Outline of Final Research Achievements

Metal contacts generally show better high-bias stability under AC biases because of the time-averaging of the electromigration force under alternating currents. To observe this AC effect for single-atom contacts of metals, we carried out break-voltage and lifetime measurements on Au single-atom contacts under AC biases. For frequencies up to 100 kHz, the AC break voltage does not surpass the one at DC. The absence of the AC effect can be understood by considering the hopping of electrode atoms, the frequency of which increases with the bias and makes the time averaging of the electromigration force ineffective near the breakdown. Thus, we employed a low bias and measured the contact lifetime at 1 MHz. However, the lifetime distributions obtained at DC and 1 MHz appear the same and show no signs of the AC effect. Probably, the electromigration force is not a dominant instability mechanism at low biases and its reduction by the AC effect little affects the contact lifetime.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • 2014 Research-status Report
  • Research Products

    (8 results)

All 2017 2016 2015 2014

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (3 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Formation of icosahedral nanowires2016

    • Author(s)
      N. Fujita, S. Kurokawa, and A. Sakai
    • Journal Title

      Physica status solidi B

      Volume: 253 Issue: 6 Pages: 1149-1155

    • DOI

      10.1002/pssb.201552544

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Jump to contact of hcp nanowires2016

    • Author(s)
      S. Wakasugi, S. Kurokawa, and A. Sakai
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 55 Issue: 12 Pages: 128002-128002

    • DOI

      10.7567/jjap.55.128002

    • NAID

      210000147311

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Single-atom conductance of Y2016

    • Author(s)
      N. Parveen, Y. Ishino, S. Kurokawa, and A. Sakai
    • Journal Title

      Physica B

      Volume: 488 Pages: 57-61

    • DOI

      10.1016/j.physb.2016.02.002

    • NAID

      110009756288

    • Related Report
      2015 Research-status Report
    • Peer Reviewed
  • [Journal Article] On the Single-Atom Conductance of Ti2015

    • Author(s)
      N. Parveen, S. Kurokawa, and A. Sakai
    • Journal Title

      e-Journal of Surface Science and Nanotechnology

      Volume: 13 Issue: 0 Pages: 435-439

    • DOI

      10.1380/ejssnt.2015.435

    • NAID

      130005102003

    • ISSN
      1348-0391
    • Related Report
      2015 Research-status Report
    • Peer Reviewed
  • [Journal Article] High-frequency signal transmission through single-atom contacts of Au and Pt2015

    • Author(s)
      S. Aoyama, S. Kurokawa, and A. Sakai
    • Journal Title

      Applied Physics Letters

      Volume: 106 Issue: 12

    • DOI

      10.1063/1.4916327

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Presentation] Improved high-bias stability of single-atom contacts formed by junction closing2017

    • Author(s)
      Shin-saku Wakasugi, Shu Kurokawa, and Akira Sakai
    • Organizer
      American Physical Society March Meeting
    • Place of Presentation
      New Orleans (United States of America)
    • Year and Date
      2017-03-17
    • Related Report
      2016 Annual Research Report
  • [Presentation] Improved high-bias stability of single-atom contacts formed by junction closing2016

    • Author(s)
      Shin-saku Wakasugi, Shu Kurokawa, and Akira Sakai
    • Organizer
      13th International Conference on Atomically Controlled Surfaces, Interfaces and Nanostructures ACSIN2016
    • Place of Presentation
      Rome (Italy)
    • Year and Date
      2016-10-10
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Stability of Single-Atom Contacts under AC Biases2014

    • Author(s)
      S. Murayama, S. Kurokawa, and A. Sakai
    • Organizer
      International Symposium on Surface Science and Nanotechnology, ISSS-7
    • Place of Presentation
      松江市
    • Year and Date
      2014-11-03
    • Related Report
      2014 Research-status Report

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Published: 2014-04-04   Modified: 2018-03-22  

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