Download file (1.91MB)
Download as zip (1.74MB)

コレクション

引用

説明:

Thermoelectric (TE) materials are useful for applications such as waste heat harvesting or efficient
and targeted cooling. While various strategies towards superior thermoelectrics through a reduction
of the lattice thermal conductivity have been developed, a path to enhance the power factor is
pressing. Here, we report large power factors up to 5mWm−1 K−2 at room temperature in the
kagome metal Ni3In1–xSnx . This system is predicted to feature almost dispersionless flat bands
in conjunction with highly dispersive Dirac-like bands in its electronic structure around the Fermi
energy EF [L. Ye et al., Nature Physics 1–5 (2024)]. Within this study, we experimentally and
theoretically showcase that tuning this flat band precisely below EF by chemical doping x boosts
the Seebeck coefficient and power factor, as highly mobile charge carriers scatter into the flat-band
states. Our work demonstrates the prospect of engineering extremely flat and highly dispersive
bands towards the Fermi energy in kagome metals and introduces topological flat bands as a novel
tuning knob for thermoelectrics.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: thermoelectric

刊行年月日: 2025-05-14

出版者: American Physical Society (APS)

掲載誌:

• Physical Review X (ISSN: 21603308) vol. 15 issue. 2 p. 21054-21054 021054

研究助成金:

• Japan Science and Technology Agency JPMJMI19A1
• Technische Universität Wien
• Northwestern University
• Massachusetts Institute of Technology

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1103/physrevx.15.021054

関連資料:

その他の識別子:

連絡先:

更新時刻: 2025-11-11 16:30:10 +0900

MDRでの公開時刻: 2025-11-11 16:24:12 +0900