| Project/Area Number |
22540404
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Mathematical physics/Fundamental condensed matter physics
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
KANESHITA Eiji 仙台高等専門学校, 総合科学系, 准教授 (60548212)
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| Co-Investigator(Renkei-kenkyūsha) |
ARAI Masatoshi 日本原子力開発機構, J-PARCセンター物質 生命科学デビジョン, 研究主席 (30175955)
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| Project Period (FY) |
2010-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | 不規則系 / 対称性の破れ / 構造ガラス / 熱電変換物質 / クラスレート / THzダイナミクス / ガラス / ボソンピーク / THZダイナミックス / 内包系物質 / THzダイナミックス |
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| Research Abstract |
This 4 years research project aims to theoretically elucidate the origin and mechanisms of glass-like behaviors observed for local-symmetry broken materials. In the first 2 years, we investigated the microscopic origin emerging glass-like properties in these materials. We introduced long-range interactions between symmetry-broken ions in addition to local anharmonic potential. The importance of these interactions to explain glass-like behaviors became clear. In the latter 2 years, we calculated phonon dispersion relations in the THz frequency range for local symmetry broken materials. It became possible to compare it with the experimental results in terms of coherent inelastic neutron scattering for local-symmetry broken materials .
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