物性研究所短期研究会「熱電材料の高性能化はどこまで行くか」
ISSP Regular Workshop: How high can we raise thermoelectric performance?
- 開催日時 / Date: 2023年12月5日、6日（火・水）/ Dec 5th (Tue.) and 6th (Wed.), 2023
（12月5日10時開始、12月6日17時半終了の予定） - 開催趣旨
熱電変換材料は、ペルチェ冷却のほかに、ゼーベック効果による固体素子で熱エネルギーを直接電気に変換できる材料でもあり、廃熱発電の省エネ効果や無数のセンサーの自立電源としても期待されている。熱電変換材料の性能は性能指数ZT = S2σT/κ（S：ゼーベック係数、σ：電気伝導率、κ：熱伝導率、T：温度）で表わされるが、熱電物性の各パラメーター間のパラドックス的な要請があって、高性能化が一般的に容易ではない。しかし、高いZTを得られる種々の高性能化戦略が進んでおり、従来はZT ~ 1が高性能材料の一つのベンチマークとされていたのが、最近はZT > 2が得られる高性能材料例が増えている。巨大なパワーファクターS2σも異なる系で見つかって来ている。また、熱電分野の理論的側面に関しては、従来は現象学的な半古典的なボルツマン理論が用いられてきたが、ここ数年、量子力学的な取り扱い「熱電線形応答理論（Kubo-Luttinger理論）」が開発され、従来の予測を超えた新規な熱電特性の発見の道筋が切り開かれ始めた。さらに、トポロジカル材料、カーボンナノチューブ、有機材料などの新規材料系の進歩も進んでいる。このように、凝縮物性の理解に基づく様々な新しい原理が実験的にも理論的にも進展しており、本研究会では、集中的な議論を通じて新たな挑戦的な展望が切り開かれることが期待される。
In addition to Peltier cooling, thermoelectric materials can directly convert thermal energy into electricity due to the Seebeck effect. They can be valuable for energy saving via waste heat power generation and as stand alone power sources for innumerable sensors. The figure of merit ZT = S2σT/κ (S: Seebeck coefficient, σ: electrical conductivity, κ: thermal conductivity, T: temperature) is a measure of performance. There are paradoxical requirements between the parameters, and it is generally not easy to improve performance. However, various enhancement strategies are progressing, and while ZT ~ 1 was previously regarded as a benchmark for high performance, recently examples of ZT > 2 are being developed. Huge power factor S2σ has also been discovered in different systems. Regarding the theoretical aspects of thermoelectrics, the phenomenological, semiclassical Boltzmann theory has traditionally been used, but in recent years a quantum mechanical approach, the thermoelectric linear response theory (Kubo Luttinger theory) has been developed, and the path to discovering novel thermoelectric properties beyond conventional predictions has begun to open up. Furthermore, progress is being made in novel material systems such as topological materials, carbon nanotubes, and organic materials. In this way, various new principles based on the understanding of condensed matter properties have been progressing both experimentally and theoretically, and it is expected at this Workshop that through intensive discussion, new challenging perspectives will be opened up. - Keynote Speaker: Hidetoshi Fukuyama (Tokyo University of Science)
- Invited Speakers:
Jun Fujioka (University of Tsukuba) Satoru Nakatsuji (The University of Tokyo)
Jun Hayakawa (Hitachi, Ltd) Masao Ogata (The University of Tokyo)
Yoshihiro Iwasa (The University of Tokyo) Yoshihiko Okamoto (The University of Tokyo)
Tsutomu Kanno (Panasonic Corporation) Taishi Takenobu (Nagoya University)
Akio Kimura (Hiroshima University) Tsunehiro Takeuchi (Toyota Technological Institute)
Kazuhiko Kuroki (Osaka University) Junichi Takeya (The University of Tokyo)
Chul-Ho Lee (National Institute of Advanced Industrial Science and Technology) Ichiro Terasaki (Nagoya University)
Hideaki Maebashi (The University of Tokyo) Kaoru Toko (University of Tsukuba)
Manaho Matsubara (Tokyo University of Science) Naohito Tsujii (National Institute for Materials Science)
Masaki Mizuguchi (Nagoya University) Kenichi Uchida (National Institute for Materials Science)
Takao Mori (National Institute for Materials Science) Takahiro Yamamoto (Tokyo University of Science)
Takehiko Mori (Tokyo Institute of Technology) Kazuhiro Yanagi (Tokyo Metropolitan University)
Yoshiaki Nakamura (Osaka University)
Akitoshi Nakano (Nagoya University)
- プログラム / Program
- 要旨集 / Abstract Book
- ポスター発表募集 / Call for Posters
（少数の口頭発表の枠もございます / There are also several slots for regular oral presentations.） - 参加登録 / Registration
- 参加登録の期限 / Registration Deadline:
・招待講演者・柏ゲストハウスへの宿泊希望者：11月7日（火）
Nov. 7th for invited speakers and participants who plan to stay at Kashiwa Guest House.
・上記以外の方：11月24日（金）
Nov. 24th for others. - 開催方式：対面開催 / The workshop will be held onsite only.
- 会場：東京大学物性研究所 大講義室（東京大学柏キャンパス 物性研究所A棟6階）
Venue: Lecture Room, ISSP, Univ. Tokyo. (6th Floor, bldg. A, ISSP, Kashiwa Campus, Univ. Tokyo) - 会場へのアクセス：東京大学物性研究所、大講義室、シャトルバス (柏の葉キャンパス駅 ⇔ 東京大学柏キャンパス)
Access: ISSP, Lecture room, Shuttle bus (Kashiwanoha Campus Sta. ⇔ Kashiwa Campus) - 参加登録費 / Registration fee：無料 / Free of charge
- 講演言語 / Official Language：基本は英語 / English
- アブストラクトの提出 / Submission of abstract: 提出期限/ Deadline：11月24日（金）/ Nov. 24th
テンプレートを基にA4用紙に1枚で作成し、pdfに変換の上、yokamoto＠issp.u-tokyo.ac.jp （東大物性研 岡本）にメール添付でご提出ください。
Please prepare your abstract in pdf format using a templete and submit it to yokamoto＠issp.u-tokyo.ac.jp (Y. Okamoto, ISSP) via email.
- 柏ゲストハウス・物性研周辺のホテルのご案内 / Accommodation Guide
- News
- Oct. 27th, 2023, website open.
- Dec. 1st, 2023, program was uploaded.
- Dec. 4st, 2023, abstract book was uploaded.
- 提案者 / Organizing Committee:
Takao Mori (National Institute for Materials Science), Hidetoshi Fukuyama (Tokyo University of Science), Yoshihiro Iwasa (The University of Tokyo), Hatsumi Mori (The University of Tokyo), Satoru Nakatsuji (The University of Tokyo), Masao Ogata (The University of Tokyo), Yoshihiko Okamoto (The University of Tokyo), Ichiro Terasaki (Nagoya University), Shinji Tsuneyuki (The University of Tokyo), Takahiro Yamamoto (Tokyo University of Science) - 問い合わせ先 / Contact:
yokamoto_at_issp.u-tokyo.ac.jp（東大物性研 岡本）
KOBAYASHi.Kazuaki_at_nims.go.jp （物質・材料研究機構 小林）
（_at_を@に置き換えてください / Please replace "_at_" with "@"）