Quantization of surface electrons and their applications to construction of artificial atoms and molecules

• Project/Area Number: 18360020
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Thin film/Surface and interfacial physical properties
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: HIRAYAMA Hiroyuki Tokyo Institute of Technology, 大学院・総合理工学研究科, 教授 (60271582)
• Project Period (FY): 2006 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥11,910,000 (Direct Cost: ¥11,100,000、Indirect Cost: ¥810,000); Fiscal Year 2008: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2007: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2006: ¥8,400,000 (Direct Cost: ¥8,400,000)
• Keywords: 量子閉じ込め / 2次元電子系 / 表面 / 走査トンネル顕微鏡 / 数値計算 / 2次元電子 / 数値計算プログラム

Research Abstract

本研究では、STM探針を用いたSi(111)√3x√3-Ag表面へのナノサイズ閉曲線の書き込み、およびAg(111)超薄膜表面に核形成したナノ島への表面電子状態の量子閉じ込めにおいて、閉じ込め構造のサイズ・形状を変化させることで原子・分子様な任意の離散的電子状態を人工的に制御形で実現できることを検証した。また任意のサイズ・形状の閉じ込め構造に対する量子状態の数値計算ツールの開発した。さらに形状がナノサイズレベルの場合には、量子構造は室温においても観測できること、および閉じ込めポテンシャルを評価する際のS波近似の適用限界を明らかにし、さらにこれを超えるS+P+D波近似での評価方法を開発した。

Research Products

• [Journal Article] An STM study of Ge heteroepitaxial Growth on Si(111)√3x√3-B Surfaces (2008)
  • Author(s): T.Sekiguchi & H.Hirayama
  • Journal Title: Surface Science 602 Pages: 3279-3283
  • Peer Reviewed
• [Journal Article] Thicknessand Deposition Temperature-dependent Morphological Change in Electric Growth of Ultra-thin Ag Films on Si(111)Substrates (2008)
  • Author(s): M.Miyazaki & H.Hirayama
  • Journal Title: Surface Science 602 Pages: 276-282
  • Peer Reviewed
• [Journal Article] Electron Confinement in a STMlithographed Nanoscale Domain on an Si(111)√3x√3-Ag Surface at Room Temperature (2008)
  • Author(s): S.Minamoto, T.Ishiduka & H. Hirayama
  • Journal Title: Surface Science 602 Pages: 470-474
  • Peer Reviewed
• [Journal Article] An STM study of Ge heteroepitaxial Growth on Si(111)√<3x>√<3-> B Surfaces (2008)
  • Author(s): Tsuka Sekiguchi, Hiroyuki Hirayama
  • Journal Title: Surface Science 602 Pages: 3279-3283
  • Peer Reviewed
• [Journal Article] Electron Confinement in a STM-lithographed Nanoscale Domain on an Si(111)〓3x〓3-Ag Surface at Room Temperature (2008)
  • Author(s): S. Minamoto, T. Ishiduka & H. Hirayama
  • Journal Title: Surface Science 602 Pages: 470-474
  • Peer Reviewed
• [Journal Article] Thickness-and Deposition Temperature-dependent Morphological Change in Electric Growth of Ultra-thin AgFilms on Si(111)Substrates (2008)
  • Author(s): M. Miyazaki & H. Hirayama
  • Journal Title: Surface Science 602 Pages: 276-282
  • Peer Reviewed
• [Journal Article] Scattering of the S1-surface state electron by an isolated adatom at Si(111)√3 x √3-Ag surface (2007)
  • Author(s): S.Minamoto, Y.Ogawa, Y.Sano & H. Hirayama
  • Journal Title: Physica E40 Pages: 324-327
  • Peer Reviewed
• [Journal Article] Scattering of the S1-surface state electron by an isolated adatom at Si(111)〓3 x〓3-Ag surface (2007)
  • Author(s): S. Minamoto, Y. Ogawa, Y. Sano & H.Hirayama
  • Journal Title: Physica E 40 Pages: 324-327
  • Peer Reviewed
• [Journal Article] Barrier Height Imaging of Si(111)3x1-Ag reconstructed surfaces (2006)
  • Author(s): T. Furuhashi, Y. Ohshima, H. Hirayama
  • Journal Title: Applied Surface Science 253 Pages: 651-654
  • Peer Reviewed
• [Journal Article] Two-photon Resonance in Optical Second Harmonic Generation From Quantum Well States in Ultra-thin Ag Films grown on Si(111)Surfaces (2006)
  • Author(s): H.Hirayama & M.Watai
  • Journal Title: Surface Science 600 Pages: 3825-3829
  • Peer Reviewed
• [Journal Article] Barrier Height Imaging of Si(111) 3x1-Ag Reconstructed Surfaces (2006)
  • Author(s): T.Furuhashi, Y.Ohshima, H.Hirayama
  • Journal Title: Applied Surface Science 253 Pages: 651-654
• [Journal Article] Two-Photon Resonance in Optical Second harmonic Generation From Quantum Well States in Ultra-thin Ag Films Grown on Si(111) Surfaces (2006)
  • Author(s): H.Hirayama, M.Watai
  • Journal Title: Surface Science 600 Pages: 3825-3829
• [Journal Article] Growth of atomically flat ultra-thin Ag films on Si surfaces
  • Author(s): H. Hirayama
  • Journal Title: Surface Science (印刷中)
  • Peer Reviewed
• [Journal Article] Scattering Potential Evaluation with S+P+D Wave Expansion of a Vacancy Complex on a Si(111)√3x√3-Ag Surface
  • Author(s): S.Minamoto & H.Hirayama
  • Journal Title: Materials Science, Engineering B(印刷中)
  • Peer Reviewed
• [Presentation] Quantum confinements at surfaces (2009)
  • Author(s): H. Hirayama
  • Organizer: Tokyo Tech-Tsinghua University Joint Symposium
  • Place of Presentation: 田町
  • Year and Date: 2009-11-19
• [Presentation] Agナノ薄膜上のstep端および転位近傍における表面中の膜厚依存性 (2009)
  • Author(s): 澤敬一、青木悠樹、平山博之
  • Organizer: 第56回応用物理学関係連合講演会
  • Place of Presentation: 筑波大学
  • Year and Date: 2009-03-30
• [Presentation] Si(111)基板上におけるAg(111)薄膜の表面準位に対する膜厚・転位・量子閉じ込めの影響 (2009)
  • Author(s): 澤敬一、青木悠樹、平山博之
  • Organizer: 日本物理学会第64回年次大会
  • Place of Presentation: 立教大学(30pRD-4)
  • Year and Date: 2009-03-30
• [Presentation] Nanostructures and their electronic states at surfaces (2009)
  • Author(s): H. Hirayama
  • Organizer: New Zealand-Tokyo Institute of Technology Seminar on Nanotechnology
  • Place of Presentation: 大岡山
  • Year and Date: 2009-01-30
• [Presentation] Si(111)7x7基板上のAgナノ薄膜表面における電子定在波のAg膜厚依存性 (2008)
  • Author(s): 澤敬一、青木悠樹、平山博之
  • Organizer: 第29回表面科学講演大会
  • Place of Presentation: 早稲田大学(2C28)
  • Year and Date: 2008-11-15
• [Presentation] Surface Electron Scattering at Dislocations on Atomically Flat Thin Ag Films (2008)
  • Author(s): K.Sawa, Y. Aoki, H. Hirayama
  • Organizer: 4th Vacuum and Surface Sciences Conference of Asia and Australia(VASSCAA-4)
  • Place of Presentation: 松江(29B11)
  • Year and Date: 2008-10-29
• [Presentation] Si(111)表面上にelectronic growthしたAg超薄膜の臨界膜厚制御 (2008)
  • Author(s): 宮崎優、平山博之
  • Organizer: 日本物理学会第63回年次大会
  • Place of Presentation: 岩手大学(21aXB-9)
  • Year and Date: 2008-09-21
• [Presentation] Si(111)√3x√3-B表面上のGeエピタキシャル成長のSTM観察 (2008)
  • Author(s): 関口津加、平山博之
  • Organizer: 日本物理学会第63回年次大会
  • Place of Presentation: 岩手大学(20pXA-2)
  • Year and Date: 2008-09-20
• [Presentation] Si(111)7x7基板上のAgナノ薄膜表面における電子の定在波観察 (2008)
  • Author(s): 澤敬一、青木悠樹、平山博之
  • Organizer: 第69回応用物理学学術講演会
  • Place of Presentation: 中部大学(5a-L-9/II)
  • Year and Date: 2008-09-05
• [Presentation] Si(111)√3x√3-Ag表面上の空孔島における室温での散乱ポテンシャルの解析 (2008)
  • Author(s): 源聡、平山博之
  • Organizer: 第69回応用物理学学術講演会
  • Place of Presentation: 中部大学(5a-L-10/II)
  • Year and Date: 2008-09-05
• [Presentation] Controlling the Magic Thickness in Electronic Growth of Atomically Flat Ag Films on Si(111)Substrates (2008)
  • Author(s): H. Hirayama, M. Miyazaki
  • Organizer: 2008 International Conference on Nanoscience+Technology(ICN+T2008)
  • Place of Presentation: Keystone, CO. U.S. A(NM2-WeA4)
  • Year and Date: 2008-07-23
• [Presentation] Controlling the Magic Thickness in Electronic Growth of Atomically Flat Ag Films on Si(111)Substrates (2008)
  • Author(s): Hiroyuki Hirayama
  • Organizer: 2008 International Conference on Nanoscience+Technology (ICN+T2008)
  • Place of Presentation: Keystone, CO, U.S.A.
  • Year and Date: 2008-07-23
• [Presentation] Partial wave approximation of scattering of the S1-suface state electron by an isolated adatom at Si(111)√3x√3-Ag surface at room temperature (2008)
  • Author(s): S. Minamoto, H. Hirayama
  • Place of Presentation: Makuhari(STAC2-STSI1)
  • Year and Date: 2008-05-31
• [Presentation] Partial wave approximation of scattering of the S1-suface state electron by an isolated adatom at Si(111)√<3x>√<3->Ag surface at room temperature (2008)
  • Author(s): Satoshi Minamoto, Hiroyuki Hirayama
  • Organizer: STAC2-STSI1
  • Place of Presentation: 幕張
  • Year and Date: 2008-05-31
• [Presentation] Si(111)7x7水素吸着表面上におけるAg超薄膜成長 (2008)
  • Author(s): 宮崎優、平山博之
  • Organizer: 第55回応用物理学関係連合講演会
  • Place of Presentation: 日本大学理工学部船橋キャンパス(28a-Q-3)
  • Year and Date: 2008-03-28
• [Presentation] Ag超薄膜のElectronic Growthにおける歪と電子系エネルギーの競合 (2007)
  • Author(s): 平山博之
  • Organizer: 東北大学電気通信研究所協同プロジェクト研究会
  • Place of Presentation: 松島
  • Year and Date: 2007-10-26
• [Presentation] Si(111)表面上Ag超薄膜のelectric growthにおける量子効果とカイネティクスの競合 (2007)
  • Author(s): 宮崎優、平山博之
  • Organizer: 日本物理学会第62回年次大会
  • Place of Presentation: 北海道大学(21-XJ-2)
  • Year and Date: 2007-09-21
• [Presentation] 低温蒸着および室温アニールによる超平坦Agエピタキシャル膜形成のSTM観察 (2007)
  • Author(s): 佐野宜紀、小川百合香、平山博之
  • Organizer: 第68回応用物理学関連連合講演会
  • Place of Presentation: 青山学院大学相模原キャンパス(29p-SL-21)
  • Year and Date: 2007-03-21
• [Presentation] Quantum Confinements at Ag/Si(111)Surfaces (2007)
  • Author(s): H. Hirayama
  • Organizer: SSNS' 07
  • Place of Presentation: Appi
  • Year and Date: 2007-01-25
• [Presentation] Energy resolution for standing wave confined into Two-Dimensional Artificial Nano-Strcutures at Si(111)√3x√3-Ag Surfaces at room temperature (2007)
  • Author(s): S .Minamoto, T. Ishiduka, H. Hirayama
  • Organizer: nanoPHYS' 07
  • Place of Presentation: Ookayama, Tokyo
  • Year and Date: 2007-01-24
• [Presentation] Electron Scattering by Isolated adatoms at Si(111)√3x√3-Ag Surfaces (2007)
  • Author(s): Y. Ogawa, Y. Sano, S. Minamoto, H. Hirayama
  • Organizer: nanoPHYS' 07
  • Place of Presentation: Ookayama, Tokyo
  • Year and Date: 2007-01-24
• [Presentation] A competition between quantum effect and kinetic processes in Ag thin film growth on Si(111)7x7 substrates (2007)
  • Author(s): M. Miyazaki & H. Hirayama
  • Organizer: 9th International Conference on Atomically Controlled Surfaces
  • Place of Presentation: Interfaces, Nanostructures(ACSIN9)
• [Presentation] A competition between quantum effect and kinetic processes in Ag thin film growth on Si(111)7x7 substrates (2007)
  • Author(s): M. Miyazaki, H. Hirayama
  • Organizer: ACSIN9
  • Place of Presentation: Tokyo
• [Book] Size Control of Nanostructures by Quantum Confinement(Chapter 3-1 in "Nano-Materials Research Toward Applications"(ed. H. Hosono & Y. Mishima)) (2006)
  • Author(s): H. Hirayama
  • Publisher: Elsevier Science Publisher
• [Remarks]
  • URL: http://www.materia.titech.ac.jp/~hirayama/2006hirayamalabHP/index.htm
• [Remarks]
  • URL: http://www.materia.titech.ac.jp/~hirayama/2006hirayamalabHP/index.htm