Exploring qunatum properties of heterosystems for molecular archtechtonics

2017 Fiscal Year Final Research Report

• Project Area: Molecular Architectonics: Orchestration of Single Molecules for Novel Function
• Project/Area Number: 25110008
• 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: Takagi Noriaki 東京大学, 大学院新領域創成科学研究科, 准教授 (50252416)
• Co-Investigator(Kenkyū-buntansha): 荒船 竜一 国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, 主任研究者 (50360483)
• Project Period (FY): 2013-06-28 – 2018-03-31
• Keywords: 表面 / 近藤効果 / トンネル顕微鏡 / スピン軌道相互作用 / 分子磁性 / 単原子層物質

Outline of Final Research Achievements

We explored quantum properties caused by the interplay of molecular spins and conduction electrons in hetero-systems consisting of magnetic molecules and metal electrodes. We controlled the quantum phase transition between Kondo resonance state and an anisotorpic spin state derived from the spin-orbit interaction in an iron phthalocyanine molecule on a Au(111) electrode surface. We elucidated the geometric and electronic structures for silicene, MoTe2 and WTe2 which are topologically unique materials; silicene is a strong candidate of two-dimensional topological insulator and MoTe2 and WTe2 are candidates of Weyl semimetal. In addition, we determined by using laser photoemission spectroscopy the spin texture of unoccupied image potential surface state on Au and graphene-covered Ir electrodes.

Free Research Field

表面科学