Superconductivity in mixed anionic compounds and exploring of its related materials
| Project/Area Number |
15K17698
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 超伝導 / 混合アニオン |
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| Outline of Final Research Achievements |
Mixed anoinic compounds often have a unique crystal structure and electronic properties beyond the single anion coordination system, such as oxides, owing to the coexistence of multiple anions with different valences, ionic radii, electronegativities, and atomic polarizabilities in the structure. Here, we carefully studied physical properties on the solid solution of the mixed anionic superconductor BaTi2Pn2O (Pn = Sb, Bi), which enables systematic change in coordination environment of Ti. We found that electronic state of BaTi2Pn2O is closely related to the mixed anionic coordination and a drastic change of electronic state occurs by isovalent substitution of Bi for Sb, resulting in the complicated electronic phase diagram. Moreover, important clues behind their superconductivity were found by aliovalent substitution, single crystal growth, and exploring novel related materials of BaTi2Pn2O.
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Report
(3 results)
Research Products
(8 results)
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[Presentation] Superconductivity in Titanium Pnictide Oxides2015
Author(s)
Takeshi Yajima, Kousuke Nakano, Fumitaka Takeiri, Yasumasa Nozaki, Wataru Ishii, Zenji Hiroi, Toshio Ono, Yuko Hosokoshi, Yoshitaka Matsushita, James Hester, Takafumi Yamamoto, Naruki Tsuji, Jungeun Kim, Akihiko Fujiwara, Yoji Kobayashi, and Hiroshi Kageyama
Organizer
The 2015 International Chemical Congress of Pacific Basin Societies (Pacifichem2015)
Place of Presentation
Honolulu (USA)
Year and Date
2015-12-15
Related Report
Int'l Joint Research
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