Study on ruthenate superconductors using epitaxy techniques
| Project/Area Number |
18H01866
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Review Section |
Basic Section 29020:Thin film/surface and interfacial physical properties-related
|
|---|
| Research Institution | Tokyo Institute of Technology (2020)
The University of Tokyo (2018-2019) |
|---|
Principal Investigator |
Uchida Masaki 東京工業大学, 理学院, 准教授 (50721726)
|
|---|
| Project Period (FY) |
2018-04-01 – 2021-03-31
|
| Project Status |
Completed (Fiscal Year 2020)
|
| Budget Amount *help |
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2018: ¥13,910,000 (Direct Cost: ¥10,700,000、Indirect Cost: ¥3,210,000)
|
|---|
| Keywords | ルテニウム酸化物 / 薄膜 / 超伝導体 / 超伝導材料 |
|---|
| Outline of Final Research Achievements |
Purposes of this study are to realize ruthenium oxide superconductors by epitaxy technique and to elucidate their superconducting states using thin films and junctions. We have succeeded in growing Sr2RuO4 superconducting thin films with a transition temperature exceeding 1.2K, and have discussed possible superconducting symmetries which can be realized in two-dimensional limit by precisely measuring the upper critical magnetic field. We have also succeeded in preparing Sr2RuO4-Sr2RuO4 Josephson junctions, and have clarified that the magnetic field dependence of the Josephson critical current maintains time-reversal symmetry. Furthermore, by growing high-quality RuO2 single crystal thin films on various substrates and controlling epitaxial strain from the substrates, we have succeeded in realizing superconductivity at 1.7 K in RuO2.
|
| Academic Significance and Societal Importance of the Research Achievements |
本成果は、転移温度が低く不純物や組成に非常に敏感な酸化物超伝導体の研究において、酸化物分子線エピタキシー技術を用いた新規超伝導体の開拓と、エピタキシャル薄膜やジョセフソン接合を利用した超伝導状態の解明が極めて有効であることを示しており、今後様々な酸化物への応用展開が期待される。
|
Report
(4 results)
Research Products
(48 results)
-
-
[Journal Article] Quantum transport observed in films of the magnetic topological semimetal EuSb22021
Author(s)
M. Ohno, M. Uchida, R. Kurihara, S. Minami, Y. Nakazawa, S. Sato, M. Kriener, M. Hirayama, A. Miyake, Y. Taguchi, R. Arita, M. Tokunaga, and M. Kawasaki
-
Journal Title
Physical Review B
Volume: 103
Issue: 16
DOI
Related Report
Peer Reviewed
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] Two-Dimensional Quantum Oscillations Observed in Magnetic Topological Semimetal EuSb2 Films2021
Author(s)
M.Ohno, M. Uchida, R. Kurihara, S. Minami, Y. Nakazawa, S. Sato, M. Kriener, M. Hirayama, A. Miyake, Y. Taguchi, R. Arita, M. Tokunaga, M. Kawasaki
Organizer
2021 MRS Spring Meeting
Related Report
Int'l Joint Research
-
-
-
-
-
-
-
[Presentation] 磁性トポロジカル半金属EuSb2薄膜における二次元量子伝導2020
Author(s)
大野瑞貴, 打田正輝, 栗原綾佑, 見波将, 中澤佑介, 佐藤慎, Markus Kriener, 三宅厚志, 田口康二郎, 有田亮太郎, 徳永将史, 川﨑雅司
Organizer
日本物理学会2020年秋季大会
Related Report
-
-
-
-
-
[Presentation] Quantum Hall Effect in Topological Semimetal Films2019
Author(s)
M. Uchida, Y. Nakazawa, S. Nishihaya, K. Akiba, M. Kriener, Y. Kozuka, A. Miyake, Y. Taguchi, M. Tokunaga, N. Nagaosa, Y. Tokura, and M. Kawasaki
Organizer
The 7th International Workshop on Emergent Phenomena in Quantum Hall Systems
Related Report
Int'l Joint Research / Invited
-
-
-
-
-
-
[Presentation] 磁性半金属EuSb2薄膜の量子輸送現象2019
Author(s)
大野瑞貴, 打田正輝, 栗原綾佑, M.-T. Huebsch, T. Yu, 中澤佑介, 佐藤慎, Markus Kriener, 三宅厚志, 田口康二郎, 有田亮太郎, 徳永将史, 川﨑雅司
Organizer
日本物理学会第75回年次大会
Related Report
-
-
-
-
-
-
-
-
-
-
-
-
