| Project/Area Number |
15K05186
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Condensed matter physics II
|
|---|
| Research Institution | Konan University |
|---|
Principal Investigator |
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
SEKIYAMA AKIRA 大阪大学, 大学院基礎工学研究科, 教授 (40294160)
TAKASE KOICHI 日本大学, 理工学部, 教授 (10297781)
|
|---|
| Project Period (FY) |
2015-04-01 – 2018-03-31
|
| Project Status |
Completed (Fiscal Year 2017)
|
| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
|
|---|
| Keywords | 電子構造 / 光電子分光 / イリジウム / 酸化物 / スピン軌道 / 角度分解 |
|---|
| Outline of Final Research Achievements |
In this study, we systematically investigate three-dimensional momentum-resolved electronic structures of Ruddlesden-Popper-type iridium oxides Srn+1IrnO3n+1 using soft-x-ray angle-resolved photoemission spectroscopy. Our results provide direct evidence of an insulator-to-metal transition that occurs upon increasing the dimensionality of the IrO2-plane structure. This transition occurs when the spin-orbit-coupled jeff = 1/2 band changes its behavior in the dispersion relation and moves across the Fermi energy. In addition, an emerging band along the G(0,0,0)-R(π,π,π) direction is found to play a crucial role in the metallic characteristics of SrIrO3. In addition, Sr3Ir2O7 solely showed the transition in conjunction with the magnetic phase transition induced by temperature change.
|
