Development of spin-polarized electron sources with single-atom dimension

• Project/Area Number: 19560027
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Thin film/Surface and interfacial physical properties
• Research Institution: Meijo University
• Principal Investigator: ROKUTA Eiji Meijo University, 理工学部, 准教授 (80298166)
• Project Period (FY): 2007 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2009: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2008: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2007: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 単原子電子源 / スピン偏極電子源 / 高輝度電子ビーム / 自己修復機能 / FEM / FIM

Research Abstract

I have developed a UHV chamber equipped with apparatus for observing both FIM and FEM images, that enables us to characterize novel spin-polarized-electron emitter with single atom dimension. By executing a remolding treatment, i.e. thermal field processing, on blunt W tips, I have fabricated electron beam sources consisting of approximately a dozen of atoms, or, at largest, a few. I have neither deposited magnetic atoms, nor started the spin-polarization measurement yet.

Research Products

• [Journal Article] FEM study of Au-deposited nanopyramids grown on blunt W tips via assistive remolding treatment (2009)
  • Author(s): E.Rokuta, et al
  • Journal Title: Technical Digest of 2009 22^<nd> Intenational Vacuum Nanoelectronics Conference(ISBN : 978-1-4244-3586-9) 22 Pages: 125-126
• [Journal Article] (2008)
  • Author(s): 大島忠平, 六田英治
  • Journal Title: 表面科学 第29巻 Pages: 659-664
• [Journal Article] (2008)
  • Author(s): 石川剛, 趙福來, 六田英治, 大島忠平
  • Journal Title: ケミカルエンジニヤリング 第53巻 Pages: 387-392
• [Journal Article] (2008)
  • Author(s): E. Rokuta, H.-S. Kuo, T. Itagaki, K. Nomura, T. Ishikawa, B.-L. Cho, I.-S. Hwang, T.T. Tsong, C. Oshima
  • Journal Title: Surface Science 602 Pages: 2508-2512
• [Journal Article] (2008)
  • Author(s): Tsuyoshi Ishikawa, Boklae Cho, Eiji Rokuta, Chuhei Oshima
  • Journal Title: Applied Physics Express 1 Pages: 77001-77001
• [Journal Article] (2008)
  • Author(s): K. Nomura, E. Rokuta, T. Itagaki, C. Oshima, Hong-shi Kuo, T.T. Tsong
  • Journal Title: e-Journal of Surface Science and Nanotechnology 6 Pages: 31-34
• [Journal Article] (2008)
  • Author(s): T. Ishikawa, K. Tagawa, T. Urata, C. Oshima, B. Cho, E. Rokuta
  • Journal Title: e-Journal of Surface Science and Nanotechnology 6 Pages: 11-14
• [Journal Article] Field Emission Spectra of Single-Atom Tips with Thermodynamically Stable Structures (2008)
  • Author(s): E. Rokuta
  • Journal Title: Surface Science 602 Pages: 25082512-25082512
  • Peer Reviewed
• [Journal Article] Direct Confirmation of the High Coherency of the Electron Beam from a Nanotip (2008)
  • Author(s): T. Ishikawa
  • Journal Title: Applied Physics Express 1
  • Peer Reviewed
• [Journal Article] 電界放出電子のエネルギー分布 (2008)
  • Author(s): 大島忠平
  • Journal Title: 表面科学 29 Pages: 659664-659664
• [Journal Article] Fluctuations of electron beams emitted from single-atom electron sources prepared with different techniques (2008)
  • Author(s): T. Ishikawa
  • Journal Title: e-Journal of Surface Science and Nanotechnology 6 Pages: 11-14
  • Peer Reviewed
• [Journal Article] Electron Emission Characteristics of Au-Covered Tungsten<111>Nanotips (2008)
  • Author(s): K. Nomura
  • Journal Title: e-Journal of Surface Science and Nanotechnology 6 Pages: 31-34
  • Peer Reviewed
• [Journal Article] (2007)
  • Author(s): T. Koizumi, M. Ikeda, D. Takagi, S. Chiashi, E. Rokuta, C. Oshima, Y. Homma
  • Journal Title: Japanese Journal of Applied Physics Vol.46,No.9A Pages: 6087-6090
• [Journal Article] (2007)
  • Author(s): B. Cho, T. Itagaki, T. Ishikawa, E. Rokuta, C. Oshima
  • Journal Title: J. Vac. Sci. Techonol. B25 Pages: 1420-1423
• [Journal Article] (2007)
  • Author(s): T. Ishikawa, T. Urata, B. Cho, E. Rokuta, C. Oshima, Y. Terui, H. Saito, A. Yonezawa, T.T. Tsong
  • Journal Title: Appl. Phys. Lett. 90
• [Journal Article] (2007)
  • Author(s): T. Itagaki, E. Rokuta, H.S. Kuo, K. Nomura, T. Ishikawa, B.-L. Cho, I.S. Hwang, T.T. Tsong, C. Oshima
  • Journal Title: Surface and Interface Analysis 39 Pages: 299-303
• [Journal Article] Stabilities in field electron emissions from noble-metal covered W nanotips: Apex structure dependence (2007)
  • Author(s): T. Itagaki
  • Journal Title: Surface and Interface Analysis 39 Pages: 299-303
  • Peer Reviewed
• [Journal Article] A highly efficient electron gun with a single-atom electron source (2007)
  • Author(s): T.Ilshikawa
  • Journal Title: Applied Physics Letters 90 Pages: 143120-143122
  • Peer Reviewed
• [Journal Article] Extreme high vacuum field emission microscope for study on the inherent fluctuation of field emission (2007)
  • Author(s): B. Cho
  • Journal Title: Journal of Vacuum Science and Technology B25 Pages: 1420-1423
  • Peer Reviewed
• [Journal Article]
  • Author(s): E. Rokuta, H. Murata, R. Sakurai, S. Shimizu, S. Fuita, H. Shimoyama, C. Oshima
  • Journal Title: Technical Digest of 2009 22^<nd> International Vacuum Nanoeletronics Conference (Japan, ISBN:978-1-4244-3586-9) Pages: 125-126
• [Presentation] 単原子電子源の電子放出 (2009)
  • Author(s): 六田英治
  • Organizer: 表面科学会中部支部研究会
  • Place of Presentation: 浜松
  • Year and Date: 2009-11-28
• [Presentation] 単原子電子源の電子放出 (2009)
  • Author(s): 六田英治
  • Organizer: 表面科学会中部支部研究会
  • Place of Presentation: 静岡大学電子工学研究所
  • Year and Date: 2009-11-28
• [Presentation] FEM study of Au-deposited nanopyramids grown on blunt W tips via assistive remolding treatment (2009)
  • Author(s): E. Rokuta, H. Murata, R. Sakurai, S. Shimizu, S. Fuita, H. Shimoyama, C. Oshima
  • Organizer: 2009 22^<nd> International Vacuum Nanoelectronics Conference
  • Place of Presentation: 浜松
  • Year and Date: 2009-07-22
• [Presentation] FEM study of Au-deposited nanopyramids grown on blunt W tips via assistive remolding treatment (2009)
  • Author(s): 六田英治, et al.
  • Organizer: International Vacuum Nanoelectronics Conference 2009
  • Place of Presentation: 浜松アクトシティ
  • Year and Date: 2009-07-22
• [Presentation] Remolding前処理を利用したナノ電子源の形成とシームレス・ナノ電磁界シミュレーションによるナノ電子源自己焦点効果の解析 (2009)
  • Author(s): 六田英治
  • Organizer: 日本学術振興会真空ナノエレクトロニクス第158委員会 第77回研究会
  • Place of Presentation: 浜松
  • Year and Date: 2009-04-20