| Project/Area Number |
26800173
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Condensed matter physics II
|
|---|
| Research Institution | Tohoku University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2014-04-01 – 2016-03-31
|
| Project Status |
Completed (Fiscal Year 2015)
|
| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
|
|---|
| Keywords | 電荷秩序 / 電荷ガラス / 幾何学的フラストレーション / 有機導体 / 光学伝導度 / モット絶縁体 / 超伝導 / 赤外分光 / 高圧実験 |
|---|
| Outline of Final Research Achievements |
In this study, we found a characteristic low-energy peak structure in the optical conductivity spectra of a quasi-2D organic compound with a triangular lattice, θ-(BEDT-TTF)2CsZn(SCN)4, in which competition between two kinds of charge-ordering patterns leads to a glassy CO state. We also performed optical conductivity measurements under high pressure for an antiferromagnetic dimer-Mott insulator β'-(BEDT-TTF)2ICl2 that shows superconductivity at 14.2 K under 8 GPa, which revealed that charge fluctuations inside of dimers plays an important role in the high-temperature superconductivity.
|
