2011 Fiscal Year Final Research Report
Novel Physics of non-centrosymmetric superconductors
| Project/Area Number |
20244058
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (A)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Condensed matter physics II
|
|---|
| Research Institution | Okayama University |
|---|
Principal Investigator |
ZHENG Guo-qing 岡山大学, 大学院・自然科学研究科, 教授 (50231444)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
INADA Yoshihiko 岡山大学, 大学院・教育学研究科, 教授 (80273572)
KAWASAKI Shinji 岡山大学, 大学院・自然科学研究科, 講師 (80397645)
ICHIOKA Masanori 岡山大学, 大学院・自然科学研究科, 教授 (90304295)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
SAKURAI Yoshiharu 高輝度光科学研究センター, 副主席研究員 (90205815)
|
|---|
| Project Period (FY) |
2008 – 2011
|
| Keywords | 超伝導 / 磁気共鳴 / 空間反転対称性の破れ / スピン軌道相互作用 |
|---|
| Research Abstract |
We have grown polycrystal samples of non-centrosymmetric superconductors Li_2(Pt_<1-x> Pd_x)_3B and studied the evolution of the superconducting state by NMR. We found that the superconducting state changes abruptly at x~ 0. 8. By analyzing the crystal structure, we found that the Pt(Pd) B_6 tilts abruptly beyond x~ 0. 8, which enhances the spin-orbit coupling and is responsible for the change in the superconducting state properties. We have also studied other non-centrosymmetric superconductors such as Mg_10Ir_19B_16 and Re_7B_3. The results also suggest that the local structure distortion is effective in enhancing the degree of inversion symmetry-breaking.
|
