Strongly Correlated Electrons in Quasicrystals
| Project/Area Number |
15H03685
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Condensed matter physics II
|
|---|
| Research Institution | Nagoya University |
|---|
Principal Investigator |
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
SATO NORIAKI 名古屋大学, 大学院理学研究科, 教授 (30170773)
ISHIMASA TSUTOMU 公益財団法人豊田理化学研究所, フェロー事業部門, フェロー (10135270)
|
|---|
| Project Period (FY) |
2015-04-01 – 2018-03-31
|
| Project Status |
Completed (Fiscal Year 2017)
|
| Budget Amount *help |
¥17,030,000 (Direct Cost: ¥13,100,000、Indirect Cost: ¥3,930,000)
Fiscal Year 2017: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2016: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2015: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
|
|---|
| Keywords | 強相関電子系 / 低温物性 / 金属物性 / 磁性 / 超伝導 / スピンエレクトロニクス / 物性実験 |
|---|
| Outline of Final Research Achievements |
The Au-Al-Yb quasicrystal with Tsai-type cluster exhibits novel quantum critical phenomena as observed in Yb-based heavy fermion materials with intermediate Yb valence, while the Au-Al-Yb approximant shows heavy Fermi liquid behavior. The quantum critical state of the Au-Al-Yb quasicrystal might correspond to an electronic state unique to the quasicrystals. In the process of material research, we have found superconductivity of Au-Ge-Yb approximants with Tsai-type cluster. Furthermore, we have confirmed the emergence of bulk superconductivity of Al-Zn-Mg quasicrystal at a very low transition temperature [1]. Comparison between the quasicrystal and the approximants demonstrate that the effective interaction between electrons remains attractive under variation of the atomic arrangement. In superconducting quasicrystal, the fractal geometry might interplay with superconductivity: fractal superconductivity.
[1] K. Kamiya, K. Deguchi et al., Nature Communications 9, 154 (2018).
|
Report
(4 results)
Research Products
(34 results)
-
-
-
-
[Journal Article] Direct observation of heterogeneous valence state in Yb-based quasicrystalline approximants2017
Author(s)
M. Matsunami, M. Oura, K. Tamasaku, T. Ishikawa, S. Ideta, K. Tanaka, T. Takeuchi, T. Yamada, A.P. Tsai, K. Imura, K. Deguchi, N.K. Sato, T. Ishimasa
-
Journal Title
Physical Review B
Volume: 96
Issue: 24
DOI
Related Report
Peer Reviewed
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] Au-Ga-Yb準結晶・近似結晶の磁性と電子状態2018
Author(s)
出口和彦, 廣川慎之介, 米山祐樹, 横田晋次郎, 坂本和司、井村敬一郎, 佐藤憲昭, 豊永詞, 石政勉, 山本義哉, 川井拓真, 水木純一郎, 山岡人志, 平岡望, 石井啓文
Organizer
第２２回準結晶研究会
Related Report
-
-
[Presentation] Tsai 型クラスター構造をもつAu-Al-Yb 準結晶の置換効果(II)2017
Author(s)
出口和彦, 難波慶介, 松川周矢, 廣川慎之介, 米山祐樹, 横田晋次郎,井村敬一郎, 佐藤憲昭, 豊永詞, 石政勉, 山本義哉, 山岡人志, 平岡望, 石井啓文
Organizer
第２１回準結晶研究会
Place of Presentation
北海道大学
Year and Date
2017-03-02
Related Report
-
-
-
-
-
-
-
-
-
-
-
-
