2020 Fiscal Year Final Research Report
NMR study of superconducting state near upper critical field
| Project/Area Number |
19K14657
|
|---|
| Research Category |
Grant-in-Aid for Early-Career Scientists
|
| Allocation Type | Multi-year Fund |
|---|
| Review Section |
Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
|
|---|
| Research Institution | Kyoto University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2019-04-01 – 2021-03-31
|
| Keywords | 超伝導 / 低温物性 / 強相関電子系 / 高磁場 |
|---|
| Outline of Final Research Achievements |
The purpose of this study is to "clarify the nature of FFLO superconducting states appearing in strongly correlated electron systems" using nuclear magnetic resonance (NMR) measurements.
We have performed NMR measurements on the heavy fermion superconductor CeCoIn5 and Sr2RuO4, which are expected to exhibit FFLO superconductivity at high magnetic fields,
We also performed NMR measurements on a ferromagnetic superconductor UCoGe and a nonmagnetic spin-triplet superconductor UTe2, which do not exhibit FFLO superconductivity but exhibits a peculiar behavior at high magnetic fields.
|
| Free Research Field |
強相関電子系
|
| Academic Significance and Societal Importance of the Research Achievements |
本研究成果の意義は通常、磁場をかけると壊れてしまう超伝導体に対して、強磁場中でも存在することが可能なFFLO超伝導やそれに類する超伝導状態の性質を解明することによって、超伝導体が磁場にあらがうメカニズムを知ることができることである。
超伝導体の応用を考えるうえで、強磁場中で使用可能な超伝導体は実用環境を大きく広げることが可能なため魅力的である。
また、特異な超伝導状態はほかの超伝導体にない性質を示すことが期待できるため、基礎研究の進展という意味でも意義深い
|
