2025

Papers

• “Unusual Phonon Scattering and Nanostructuring Implications on Thermoelectric Properties of the Incommensurate MnSi_γ Nowotny Chimney Ladder Phase“
  Nagendra Singh Chauhan, Shivalingam Goud Sara, Toshiaki Chiba, Amrita Bhattacharya, Kei Hayashi, Takao Mori, and Yuzuru Miyazaki
  ACS Applied Energy Materials (2025) (available online).
• “High thermoelectric properties of Mg₂Sn single crystals with engineered lattice defects“
  Kei Hayashi
  Japanese Journal of Applied Physics, 64, 110802 (2025).
• “Research Progress on Mn-based and Co-based Full-Heusler Alloys“
  Hezhang Li, Md All Amin Newton, Chen Chen, Zhicheng Huang, Kei Hayashi, Yuzuru Miyazaki, Jing-Feng Li, Chao Wang
  Solid State Sciences, 168, 108019 (2025).
• “Data-driven approach for potential iron-based half-Heusler thermoelectrics with chemical bonding characteristics“
  Xue Nan, Kei Hayashi, Zhicheng Huang, Yuzuru Miyazaki
  Science Advances, 11, eadw4514 (2025).
• “Dislocation Introduction via Domain Engineering in Mg₂Sn Single Crystal to Improve its Thermoelectric Properties“
  Zhicheng Huang, Kei Hayashi, Wataru Saito, Hezhang Li, Jun Pei, Jinfeng Dong, Toshiaki Chiba, Xue Nan, Bo-Ping Zhang, Jing-Feng Li, Yuzuru Miyazaki
  Small Methods, 2500385 (2025).

Invited talks

The 14th International Conference on High-Performance Ceramics (CICC-14)
(November 30- December 3, Haikou)

• “Incommensurately Modulated Composite Crystals: Potential Thermoelectric materials”
  Yuzuru Miyazaki (Keynote lecture)

Taiwan Consortium of Emergent Crystalline Materials (TCECM) (May 9-10, Yilan)

• “Preparation of Mg₂Sn and Mg₂Ge Single Crystals for Thermoelectric Application “
  Kei Hayashi (Invited poster)

2025 Taiwan-Japan Workshop on Crystal Growth, Analysis and Calculation (TJ-CGAC) (May 7-9, Yilan)

• “Development of single crystalline Mg₂Sn and Mg₂Ge thermoelectrics with engineered lattice defects”
  Kei Hayashi (Invited lecture)

16th Pacific Rim Conference on Ceramic and Class Technology including Glass & Optical Materials Division Metting (GOMD 2025) (May 4-9, Vancouver)

• “Data-driven approach to find potential Fe-based half-Heusler thermoelectric materials for the near-room-temperature applications”
  Yuzuru Miyazaki (Invited lecture)

Conferences

The 21st European Conference on Thermoelectrics (ECT25) (September 8-12, Nancy)

• “Preparation and Thermoelectric Properties of Doubly-substituted Fe-based Half-Heusler Alloys (V_1-xTi_x)(Fe_1-yCo_y)Sb”
  H. Konishi, X. Nan, Z. Huang, K. Hayashi, Y. Miyazaki (Poster)
• “Characterization of thermoelectric single leg using high-performance Mg₂Sn-based single crystal”
  S. Sato, K. Hayashi, Z. Huang, Y. Miyazaki (Poster)
• “Design of Oxide Thermoelecric Uni-leg Modules”
  Y. Shimizu, K. Hayashi, Y. Miyazaki (Oral)

The 41st International Conference on Thermoelectrics (& 7th Asian Conference on Thermoelectrics) ICT/ACT2025 (June 15-19, Sendai)

• “Process and composition optimization strategies on promising Cu₂-II-IV-S₄ based TE materials”
  C. Bourges, R. Al Rahal Al Orabi, Y. Miyazaki, G. Lambard, N. Sato, M. Tachibana, S. Ishii, T. Mori (oral)
• “Graphene-Assisted Electronic DOS Modulation and Phonon Scattering to Improve the Thermoelectric Performance of Mg₃Sb₂-Based Materials”
  Qiang Zhang, Jiadang Li, Nagendra S. Chauhan, Zhicheng Huang, Wenhao Fan, Kei Hayashi, Shaoping Chen, Yuzuru Miyazaki (oral)
• “Thermoelectric enhancement in half-metallic full-Heusler Mn₂VAl alloy through control of nonstoichiometry”
  Kei Hayashi, Gakuto Kanno, Hezhang Li, Zhicheng Huang, Jing-Feng Li, Yuzuru Miyazaki (oral)
• “Enhancement of Thermoelectric Properties in P-Type V_0.6Ti_0.4FeSb Alloys via Point Defects Engineering”
  Zhicheng Huang, Xue Nan, Hiroaki Konishi, Kei Hayashi, Yuzuru Miyazaki (oral)
• “Data-driven approach for potential iron-based half-Heusler thermoelectrics with chemical bonding characteristics”
  Xue Nan, Kei Hayashi, Zhicheng Huang, Yuzuru Miyazaki (poster)
• “Chemical bond engineering towards optimal-performance V_1-xTi_xCo_1-yFeySb half-Heusler thermoelectrics”
  Xue Nan, Kei Hayashi, Hiroaki Konishi, Zhicheng Huang, Yuzuru Miyazaki (poster)
• “Preparation and Thermoelectric Properties of Doubly-substituted Fe-based Half-Heusler Alloys (V_1-xTi_x)(Fe_1-yCoy)Sb”
  Hiroaki Konishi, Xue Nan, Zhicheng Huang, Kei Hayashi and Yuzuru Miyazaki (poster)
• “Preparation and thermoelectric properties of Mg₂Sn single crystals grown under high Ar pressure”
  Kazuki Murayama, Kei Hayashi, Zhicheng Huang, Yuzuru Miyazaki (poster)
• “Preparation and Thermoelectric Properties of Partially-substituted Chimney-ladder Compounds (Fe_1-xCo_x)Ge_γ (γ~1.52)”
  Tatsuhiro Kurosawa, Zhicheng Huang, Kei Hayashi, Yuzuru Miyazaki (poster)
• “Characterization of thermoelectric single leg using high-performance Mg₂Sn-based single crystal”
  Shin Sato, Kei Hayashi, Zhicheng Huang, Yuzuru Miyazaki (poster)
• “Formation of magnesium monovacancies by Sb doping into Mg₂Sn crystals”
  Mamoru Kitaura, Takuma Sumi, Yoshitaka Taira, Shinta Watanabe, Zhicheng Huang, Kei Hayashi, Yuzuru Miyazaki, Koji Michishio, Manabu Ishizaki, Akimasa Ohnishi (poster)
• “Design of Oxide Thermoelectric Uni-leg Modules”
  Yoshimi Shimizu, Kei Hayashi, and Yuzuru Miyazaki (poster)