2022 Fiscal Year Final Research Report
Study of the topological superconductor CuxBi2Se3
| Project/Area Number |
20K03862
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Review Section |
Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
|
|---|
| Research Institution | Okayama University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2020-04-01 – 2023-03-31
|
| Keywords | トポロジカル超伝導 / スピン三重項超伝導 |
|---|
| Outline of Final Research Achievements |
In order to study the superconducting properties of the topological superconductor CuxBi2Se3, sample generation and physical property measurements were conducted. Successful growth of high-quality single crystal samples enabled the performance of physical property measurements. The results of the measurements provided new insights into the spin-triplet superconducting state that characterizes topological superconductors.
In CuxBi2Se3, spin-triplet superconducting state is fixed in a certain direction, but properties of pinning were unknown. In this study, it was discovered for the first time in the world that the pinning of spin-triplet superconductivity in CuxBi2Se3 can be controlled by a magnetic field.
|
| Free Research Field |
超伝導
|
| Academic Significance and Societal Importance of the Research Achievements |
本研究では基礎科学的興味及び応用上の有用性から注目を集めているスピン三重項超伝導の物性の一端を明らかにすることができた。スピン三重項超伝導は実例の少なさから研究はほとんど進んでいなかった。また、他に研究されているスピン三重項超伝導とは異なり本研究対象のCuxBi2Se3には強磁性的な電子相関が存在しない。本研究対象はそれらとは異なる起源を持つと予測されるが、その物性を明らかにすることができた本研究はスピン三重項超伝導研究を前進させることができたと言える。
|
