| Project/Area Number |
24540369
|
|---|
| 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 | Ritsumeikan University (2014)
Kyoto University (2012-2013) |
|---|
Principal Investigator |
IKEDA Hiroaki 立命館大学, 理工学部, 教授 (90311737)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
ARITA Ryotaro 独立行政法人, 理化学研究所・創発物性科学研究センター, チームリーダー (80332592)
SUZUKI Michi-To 独立行政法人, 理化学研究所・創発物性科学研究センター, 研究員 (10596547)
|
|---|
| Project Period (FY) |
2012-04-01 – 2015-03-31
|
| Project Status |
Completed (Fiscal Year 2014)
|
| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
|
|---|
| Keywords | 重い電子系超伝導 / 隠れた秩序 / 第一原理計算 / 多極子秩序 |
|---|
| Outline of Final Research Achievements |
In the iron-based superconductors and heavy-electron systems, orbital degrees of freedom can play an important role on the appearance of curious magnetic/multipole ordering and non-BCS superconductivity. However, the complicated band structure, which involves rich physical information, has prevented us from understanding the electronic states so far. Recently, we have succeeded in constructing a low-energy effective Hamiltonian including the spin-orbit interactions. In the model Hamiltonian, we have successfully computed orbital-resolved band structure, Fermi surfaces, and magnetic/multipole susceptibilities. This method is applicable to various materials, and is very useful for understanding the physical properties. Based on this first-principles approach, we found crucial clues to several long-standing mysteries in heavy-electron systems, for instance, the hidden order in URu2Si2 and the first-discovered unconventional superconductivity in CeCu2Si2 and so on.
|
