Study of Electron/Spin Transport at Molecules by Functionalized Four-Tip STM

2017 Fiscal Year Final Research Report

• Project Area: Molecular Architectonics: Orchestration of Single Molecules for Novel Function
• Project/Area Number: 25110010
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: The University of Tokyo
• Principal Investigator: Hasegawa Shuji 東京大学, 大学院理学系研究科(理学部), 教授 (00228446)
• Co-Investigator(Kenkyū-buntansha): 秋山 了太 東京大学, 大学院理学系研究科(理学部), 助教 (40633962) ; 高山 あかり 東京大学, 大学院理学系研究科(理学部), 助教 (70722338) ; 平原 徹 東京工業大学, 理工学研究科, 准教授 (30451818)
• Research Collaborator: HOBARA Rei 東京大学, 大学院理学系研究科, 特任研究員 (30568176)
• Project Period (FY): 2013-06-28 – 2018-03-31
• Keywords: 表面電気伝導 / グラフェン / 分子シート / 多探針STM / 純スピンプローブ / 原子層超伝導 / ベリー位相

Outline of Final Research Achievements

By using our four-tip scanning tunneling microscope prober with functionalized tips, we have measured charge and spin transport properties of various molecular objects and surfaces of electrodes which are components necessary for "molecular architechtonics" . (1) The conductivity of Nickel dithiolene nanosheets is very high and changes with redox control. (2) Bilayer graphene becomes superconducting around 2 K by Calcium intercalation. (3) The Berry phase of bilayer graphene changes from 0 to π by Li-intercalation and thermal desorption treatment. (4) A probe for pure spin injection has been developed.

Free Research Field

表面物理学