Publicly Offered Research
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
The project has focused on research in emergent electronic phenomena in the family of hybrid f-/p-electron molecular materials successfully established for the first time by our work to-date within J-Physics. In order to achieve our targets, we synthesized and researched new families of molecular-based strongly correlated f-electron fullerides in which the presence of the electronically-active C60 anions is combined with mixed configuration rare earths such as Sm or Eu leading to properties intrinsically unattainable in any other system currently available. Strong correlations dominate the electronic properties of both the rare-earth cation and the C60 anion sublattices. To-date the project has unambiguously authenticated by both synchrotron X-ray diffraction and element-specific spectroscopic techniques at ambient and elevated pressures the occurrence of valence transitions accompanied by insulator-to-metal transitions arising from the simultaneous presence of the electronically-active C60 sublattice. We developed robust routes to isolate and structurally and electronically characterize at both ambient and elevated pressures the ternary systems, (Sm1-xMx)2.75C60 (M = Ca, Eu; 0 <= x <= 1) in which the Sm valence change is quasi-continuously controlled chemically by either the valence-precise Ca2+ ion or the mixed valent Eu2+/3+ ion. This has led to families of mixed valence materials with chemically and physically quasi-continuously tunable valence transitions opening up the possibility of unveiling a new type of quantum criticality caused by critical valence fluctuations.
令和元年度が最終年度であるため、記入しない。
All 2021 2020 2019 2018 Other
All Int'l Joint Research (10 results) Journal Article (9 results) (of which Int'l Joint Research: 9 results, Peer Reviewed: 9 results, Open Access: 2 results) Presentation (23 results) (of which Int'l Joint Research: 12 results, Invited: 12 results) Book (1 results) Remarks (1 results)
Journal of Physics and Chemistry of Solids
Volume: 150 Pages: 109822-109822
10.1016/j.jpcs.2020.109822
Modern Physics Letters B
Volume: 34 Issue: 19n20 Pages: 2040056-2040056
10.1142/s0217984920400564
Materials Chemistry Frontiers
Volume: 4 Issue: 12 Pages: 3521-3528
10.1039/d0qm00707b
Inorganic Chemistry
Volume: 59 Issue: 17 Pages: 12545-12551
10.1021/acs.inorgchem.0c01635
Volume: 59 Issue: 2 Pages: 1256-1264
10.1021/acs.inorgchem.9b02974
Volume: 131 Pages: 44-49
10.1016/j.jpcs.2019.03.017
Carbon
Volume: 153 Pages: 467-471
10.1016/j.carbon.2019.07.028
Volume: 58 Issue: 21 Pages: 14532-14541
10.1021/acs.inorgchem.9b02122
Journal of the American Chemical Society
Volume: 140 Issue: 51 Pages: 18162-18172
10.1021/jacs.8b11231
http://mtr1.osakafu-u.ac.jp/prassides-lab/
