The University of Tokyo · 재료과학
이 교수의 연구실은 표면 과학과 양자물리학을 융합한 고해상도 전자구조 분석을 핵심으로 하며, 2차원 물질에서의 디рак 에너지 구조, 원자단계를 넘는 전자 전도성, 양자소재 내 전자 상태의 비대칭적 분포 등에 대한 정밀한 실험적 연구를 수행하고 있습니다. 특히, 고해상도 각도분석광전자분광법과 나노스케일 전도도 측정 기법을 통해 새로운 양자물질의 전자 구조와 전기적 성질을 규명하고 있습니다. 연구는 고체 표면의 원자적 구조와 전자 상태 간의 상호작용을 깊이 있게 밝혀내며, 신소재 개발과 양자전자소자 응용에 기여하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
2D anisotropic Dirac cones are observed in χ<sub>3</sub> borophene, a monolayer boron sheet, using high-resolution angle-resolved photoemission spectroscopy. The Dirac cones are centered at the X and X' points. The data also reveal that the hybridization between borophene and Ag(111) is very weak, which explains the preservation of the Dirac cones. As χ<sub>3</sub> borophene has been predicated to be a superconductor, the results may stimulate further research interest in the novel physics of bo
We have succeeded in measuring the resistance across a single atomic step through a monatomic-layer metal on a crystal surface, Si(111)(sqrt[3]xsqrt[3])-Ag, using three independent methods, which yielded consistent values of the resistance. Two of the methods were direct measurements with monolithic microscopic four-point probes and four-tip scanning tunneling microscope probes. The third method was the analysis of electron standing waves near step edges, combined with the Landauer formula for 2
In-plane dispersion of the quantum-well states (QWS's) associated with the electron confinement in metastable epitaxial Ag films grown on the $\mathrm{Si}(111)7\ifmmode\times\else\texttimes\fi{}7$ and $\mathrm{Si}(001)2\ifmmode\times\else\texttimes\fi{}1$ surfaces is investigated by angle-resolved photoemission using synchrotron radiation. In contrast to the free-electron-like behavior expected, these QWS's show intriguing dispersions such as (i) a significant enhancement of the in-plane effecti
Our photoemission spectroscopy results clearly demonstrate that symmetry breakdown in atomic arrangement brings about a lift of degeneracy in electronic states, leading to settle a long-standing controversy on a surface superstructure. We provide unambiguous evidences that $\mathrm{Si}(111)\sqrt{3}\ifmmode\times\else\texttimes\fi{}\sqrt{3}\ensuremath{-}\mathrm{Ag}$ has the inequivalent triangle structure (IET), excluding a long-lived honeycomb-chained triangle model. We also give critical experi
