Spin-flip scattering of Rashba-induced spin-split surface band electrons by magnetic atoms

• Project/Area Number: 25600095
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Thin film/Surface and interfacial physical properties
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: HIRAYAMA Hiroyuki 東京工業大学, 総合理工学研究科(研究院), 教授 (60271582)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2013: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 表面 / 電子散乱 / スピン / ラシュバ効果

Outline of Final Research Achievements

We studied the growth, structure adn electronic structure of Co atom adsorbed Bi/Ag(111)√3x√3 surface system. Co atoms nucleated atomically flat, triangular islands with an interface-induced Moire pattern. The d-band of the Co islands were found to shift to the Fermi level systematically with the increase in the Co island thickness.
We also studied a new surface alloy phase of Bi atoms and Si(111)√3x√3-Ag surface, and ultra-thin Bi(110) islands as candidates of the alternative sysytem with a large spin-split surface band by the Rashba effect and robust against Co atom adsorption.

Research Products

• [Journal Article] Ultra-thin Bi(110) films on Si(111)√3x√3-B substrates (2015)
  • Author(s): I. Kokubo, Y. Yoshiike, K. Nakatsuji, H. Hirayama
  • Journal Title: Physical Review B Volume: 91 Issue: 7
  • DOI: 10.1103/physrevb.91.075429
  • Peer Reviewed / Open Access
• [Journal Article] Initial stage of Ag growth on Bi/Ag(111)√3x√3 surfaces (2013)
  • Author(s): H. Fukumnoto, M.Miyzaki,Y. Aoki,K.Nakatsuji and H. Hirayama
  • Journal Title: Surface Science Volume: 611 Pages: 49-53
  • DOI: 10.1016/j.susc.2013.01.013
  • Peer Reviewed
• [Presentation] Si(111)√3x√3-B表面上のBi超薄膜の成長と構造(2) (2015)
  • Author(s): 小久保郁也，吉池雄作，中辻寛，平山博之
  • Organizer: 日本物理学会
  • Place of Presentation: 早稲田大学
  • Year and Date: 2015-03-21 – 2015-03-24
• [Presentation] A STM study of Bi(110) ultra-thin films grown on Si(111)√3x√3-B surfaces (2014)
  • Author(s): I. Kokubo, Y. Yoshiike, Y. Aoki, K. Nakatsuji and H. Hirayama
  • Organizer: The 7th International Symposium on Surface Science (ISSS-7)
  • Place of Presentation: Matue, Japan
  • Year and Date: 2014-11-02 – 2014-11-06
• [Presentation] Si(111)√3x√3-B表面へのBi超薄膜の成長と構造 (2014)
  • Author(s): 小久保郁也、吉池雄作、青木悠樹、中辻寛、平山博之
  • Organizer: 日本物理学会
  • Place of Presentation: 中部大学
  • Year and Date: 2014-09-07 – 2014-09-10
• [Presentation] Ripples structure of Ag(111) ultra-thin films on Si(111)7x7 substrates (2013)
  • Author(s): Y. Yoshiike, H. Fukumoto, Y. Aoki, K. Nakatsuji and H. Hirayama,
  • Organizer: 12th International Conference on Atomically Controlled Surfaces, Interfaces and Nanostructures (ACSIN-12),
  • Place of Presentation: Tsukuba, Japan
• [Presentation] Si(111)7×7基板上Ag超薄膜表面のリップル構造 (2013)
  • Author(s): 吉池雄作，福元博之，青木悠樹，中辻寛，平山博之
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学
• [Presentation] Ag超薄膜とSi(111)基板との界面における水素吸着 (2013)
  • Author(s): 中辻寛，青木悠樹，福元博之，平山博之
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学
• [Presentation] Quantum interference of the Rashba-induced spin-split two-dimensional surface state electrons (2013)
  • Author(s): H.Hirayama
  • Organizer: Collaborative Conference on Materials Research (CC3DMR)2013
  • Place of Presentation: Jeju, Korea
  • Invited
• [Remarks] 平山・中辻研究室
  • URL: http://www.materia.titech.ac.jp/~hirayama/2009hirayamalabHP/