2021 Fiscal Year Final Research Report
Spectroscopic study of electronic structures and quantum phase transition in 5d transition metal compounds
| Project/Area Number |
19K03753
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Review Section |
Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
|
|---|
| Research Institution | Konan University |
|---|
Principal Investigator |
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
高瀬 浩一 日本大学, 理工学部, 教授 (10297781)
|
|---|
| Project Period (FY) |
2019-04-01 – 2022-03-31
|
| Keywords | 電子構造 / 光電子分光 / イリジウム酸化物 / 電子相関 / バルク / 反強磁性 / モット絶縁体 |
|---|
| Outline of Final Research Achievements |
We focused on 5d transition-metal compounds, in which some exotic ground states appear due to the strong spin-orbit coupling and electron correlation effects. The bulk electronic structures and the change induced by magnetic transition have been revealed by the photoelectron spectroscopy that utilizes highly brilliant hard-x-ray delivered from the synchrotron facility SPring-8. We offer an alternative method, in which one does not need ultrahigh energy-resolved and/or momentum-resolved spectroscopic measurements, to evaluate the origin of the insulating ground state.
|
| Free Research Field |
固体物理学
|
| Academic Significance and Societal Importance of the Research Achievements |
本研究では近年注目されている強スピン軌道結合物質において，結晶構造の次元性のクロスオーバー領域（擬2次元から3次元）において実現している絶縁体の起源が，高いエネルギー分解能や波数分解を行う長時間の観測なしに，電子の局在・遍歴の両極限におけるモデルで大別可能であることを示した．また，定量的知見が得られることも明らかとなり，従来の物性評価手法に新たな選択肢を提示したことに意義を見出せる．
|
