Charge Kondo effect in valence-skipper-doped superconductor
| Project/Area Number |
26610102
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Condensed matter physics II
|
|---|
| Research Institution | Osaka University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2014-04-01 – 2017-03-31
|
| Project Status |
Completed (Fiscal Year 2016)
|
| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
|
|---|
| Keywords | 超伝導 / 原子価スキップ / バレンススキップ / NMR |
|---|
| Outline of Final Research Achievements |
We report a 125Te-NMR study of single-crystalline Pb1-xTlxTe, revealing an increase in the average density of states (DOS) coupled to a strong spatial variation in the local DOS surrounding each Tl dopant. For the superconducting composition, the nuclear spin relaxation rate for Te ions that are close to the Tl dopants is unexpectedly enhanced in the normal state below a characteristic temperature of 10 K. This temperature coincides exactly with the temperature below which the normal state resistivity experiences an upturn. These observations provide microscopic evidence for dynamical charge fluctuations, and is consistent with expectations for charge Kondo behavior associated with the Tl dopant ions. In contrast, such anomalies were not detected in the non-superconducting samples, suggesting a connection between dynamical valence fluctuations and the occurrence of superconductivity in Pb1-xTlxTe.
|
Report
(4 results)
Research Products
(84 results)
-
-
-
[Journal Article] Superconductivity and Antiferromagnetic Spin Fluctuations in LaFe(As1-xPx)(O1-yFy) probed by 31P-NMR2017
Author(s)
T. Shiota, H. Mukuda, M. Uekubo, F. Engetsu, M. Yashima, Y. Kitaoka, K. T. Lai, H. Usui, K. Kuroki, S. Miyasaka, and S. Tajima
-
Journal Title
Journal of Physics: Conference Series
Volume: -
Related Report
Peer Reviewed / Acknowledgement Compliant
-
-
[Journal Article] Multiple Antiferromagnetic Spin Fluctuations and Novel Evolution of Tc in Iron-based superconductors LaFe(As1-xPx)(O1-yFy) revealed by 31P-NMR Studies2016
Author(s)
Takayoshi Shiota, Hidekazu Mukuda, Masahiro Uekubo, Fuko Engetsu, Mitsuharu Yashima, Yoshio Kitaoka, Kwing To Lai, Hidetomo Usui, Kazuhiko Kuroki, Shigeki Miyasaka, and Setsuko Tajima
-
Journal Title
J. Phys. Soc. Jpn.
Volume: 85
Issue: 5
Pages: 053706-053706
DOI
NAID
Related Report
Peer Reviewed / Acknowledgement Compliant
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] 超高圧下硫化重水素における2D-NMR2016
Author(s)
阪野文秀, 椋田秀和, 八島光晴, 北岡良雄, 榮永茉利, 益田明宜, 清水克哉, M. I. EremetsB, . P. Drozdo
Organizer
日本物理学会 2016年 秋季大会
Place of Presentation
金沢大学（石川県・金沢市）
Year and Date
2016-09-15
Related Report
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] 電子線照射したSrFe2(As1-xPx)2における超伝導と反強磁性揺らぎ：31P-NMR2015
Author(s)
宮本昌士, 阪野文秀, 椋田秀和, 八島光晴, 北岡良雄, 小林達也, 宮坂茂樹, 田島節子, M. Konczykowski, M. A. Tanatar, R.Prozorov
Organizer
日本物理学会 2015年秋季大会
Place of Presentation
関西大学、大阪府吹田市
Year and Date
2015-09-16
Related Report
-
[Presentation] 鉄系超伝導体 (Sr4Sc2O6)Fe2(As1-xPx)2 における結晶構造因子と反強磁性ゆらぎ：P-NMR2015
Author(s)
阪野文秀, 塩田貴佳, 圓月風子, 椋田秀和, 八島光晴, 北岡良雄, 宮坂茂樹, 田島節子, Y.-F.Guo, 山浦一成, 室町英治
Organizer
日本物理学会 2015年秋季大会
Place of Presentation
関西大学、大阪府吹田市
Year and Date
2015-09-16
Related Report
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
