| Project/Area Number |
25610095
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Condensed matter physics II
|
|---|
| Research Institution | Kyoto University |
|---|
Principal Investigator |
MAENO Yoshiteru 京都大学, 理学(系)研究科(研究院), 教授 (80181600)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
YONEZAWA Shingo 京都大学, 大学院・理学研究科, 助教 (30523584)
NAKAMURA Fumihiko 久留米工業大学, 工学部, 教授 (40231477)
|
|---|
| Project Period (FY) |
2013-04-01 – 2014-03-31
|
| Project Status |
Completed (Fiscal Year 2013)
|
| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2013: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
|
|---|
| Keywords | 一軸性圧力 / モット転移 / ルテニウム酸化物 / スピン三重項超伝導 / ピエゾ素子 |
|---|
| Research Abstract |
Application of pressure is known to induce a metallic state from an insulator or to enhance the transition temperature of a superconductor. In this project, we focus on the application of uniaxial pressure in order to amplify the effect or extract underlining mechanisms of an insulator-metal transition and exotic superconductivity. We improve the pressure apparatus for low-temperature experiments on brittle oxide crystals, as well as introduce a new apparatus capable of application of both compressional and tensile strain. Using layered ruthenium oxides, we found a strong in-plane anisotropy of the transition from a Mott insulator to a ferromagnetic metal. We also found that the superconducting transition of the ruthenium oxide Sr2RuO4 is enhanced by both compressional and tensile strain, thereby confirming the unusual behavior expected in a spin-triplet superconductor with aligned Cooper-pair angular momenta. These results demonstrate the usefulness of uniaxial pressure experiments.
|
