| Project/Area Number |
17KK0088
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| Research Category |
Fund for the Promotion of Joint International Research (Fostering Joint International Research)
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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 | Gakushuin University (2018-2022)
Tokyo Institute of Technology (2017) |
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Principal Investigator |
Machida Yo 学習院大学, 理学部, 教授 (40514740)
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| Project Period (FY) |
2018 – 2022
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥14,690,000 (Direct Cost: ¥11,300,000、Indirect Cost: ¥3,390,000)
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| Keywords | 熱電効果 / 半導体 / 半金属 / ゼーベック効果 / 黒リン / フォノン / フォノンドラッグ / フォノン流体 / グラファイト / 熱伝導 |
|---|
| Outline of Final Research Achievements |
Electrical and thermoelectrical transport measurements under pressure on the elemental semiconductor black phosphorus have unveiled the characteristic evolution of Seebeck coefficient in each conduction regime. The results help basic understanding of thermoelectricity in semiconductors. The enhancement of Seebeck coefficient has been observed at a temperature where the hydrodynamic phonon contribution is most prominent. In the semimetallic region under pressure, it is uncovered that the change in the carrier scattering mechanism provides a great impact on the thermoelectric response.
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| Academic Significance and Societal Importance of the Research Achievements |
半導体の各伝導領域でのゼーベック係数の振る舞いを詳細に明らかにすることで高温から低温に至る広い温度範囲での半導体の熱電応答に関する基礎的理解に繋がる重要な知見が得られた。またこれまで重要視されてこなかった電荷キャリアの散乱機構がゼーベック効果に与える影響を明らかにし、金属を含めた固体結晶における熱電現象のより深い理解を得ることができた。
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