Article Energy filtering–induced ultrahigh thermoelectric power factors in Ni3Ge

Fabian Garmroudi ; Simone Di Cataldo ; Michael Parzer ; Jennifer Coulter ; Yutaka Iwasaki SAMURAI ORCID (National Institute for Materials Science) ; Matthias Grasser ; Simon Stockinger ; Stephan Pázmán ; Sandra Witzmann ; Alexander Riss ; Herwig Michor ; Raimund Podloucky ; Sergii Khmelevskyi ; Antoine Georges ; Karsten Held ; Takao Mori SAMURAI ORCID (National Institute for Materials Science) ; Ernst Bauer ; Andrej Pustogow

sciadv.adv7113.pdf
Download file (3.43 MB)
Download as zip (3.03 MB)
Collection

Citation
Fabian Garmroudi, Simone Di Cataldo, Michael Parzer, Jennifer Coulter, Yutaka Iwasaki, Matthias Grasser, Simon Stockinger, Stephan Pázmán, Sandra Witzmann, Alexander Riss, Herwig Michor, Raimund Podloucky, Sergii Khmelevskyi, Antoine Georges, Karsten Held, Takao Mori, Ernst Bauer, Andrej Pustogow. Energy filtering–induced ultrahigh thermoelectric power factors in Ni3Ge. Science Advances. 2025, 11 (31), eadv7113. https://doi.org/10.1126/sciadv.adv7113

Description:

(abstract)

Traditional thermoelectric materials rely on low thermal conductivity to enhance their efficiency but suffer from inherently limited power factors. Innovative pathways to optimize electronic transport are thus crucial. Here, we achieve ultrahigh power factors in Ni3Ge- based systems through an unconventional thermoelectric materials de- sign principle. When overlapping flat and dispersive bands are engineered to the Fermi level, charge carriers can undergo intense interband scattering, yielding an energy filtering effect similar to what has long been predicted in certain nanostructured materials. Via a multistep DFT- based screening method developed here, we find a family of L12- ordered binary compounds with ultrahigh power factors up to 11 mW m−1 K−2 near room temperature, which are driven by an intrinsic phonon- mediated energy filtering mechanism. Our comprehensive experimental and theoretical study of these intriguing materials paves the way for understanding and designing high- performance scattering- tuned metallic thermoelectrics.

Rights:

Keyword: thermoelectric materials

Date published: 2025-08-01

Publisher: American Association for the Advancement of Science (AAAS)

Journal:

  • Science Advances (ISSN: 23752548) vol. 11 issue. 31 eadv7113

Funding:

  • JST JPMJMi19A1
  • OeAd- Gmbh CZ 08/2023 and HR 05/2024
  • TU Wien Bibliothek

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1126/sciadv.adv7113

Related item:

Other identifier(s):

Contact agent:

Updated at: 2025-08-18 16:30:21 +0900

Published on MDR: 2025-08-18 16:21:28 +0900

Filename Size
Filename sciadv.adv7113.pdf (Thumbnail)
application/pdf 		Size 3.43 MB Detail