Applied Physics Letters

Cubic ReSTe as a high-performance thermoelectric material

H Haruka Matsumoto (Department of Physics) H Hiroto Isomura (Institute for Solid State Physics, The University of Tokyo 1 , Kashiwanoha 5-1-5, Kashiwa 277-8581,) K Keita Kojima (Institute for Solid State Physics, The University of Tokyo 1 , Kashiwanoha 5-1-5, Kashiwa 277-8581,) R Ryutaro Okuma (Institute for Solid State Physics, The University of Tokyo 1 , Kashiwanoha 5-1-5, Kashiwa 277-8581,) H Hironori Ohshima (National Institute of Advanced Industrial Science and Technology (AIST) 2 , Tsukuba 305-8568,) C Chul-Ho Lee (Laboratory Animal Resource Center) Y Youichi Yamakawa (Department of Physics) Y Yoshihiko Okamoto (Institute for Solid State Physics, The University of Tokyo 1 , Kashiwanoha 5-1-5, Kashiwa 277-8581,)

Abstract

We report thermoelectric properties of sintered samples of undoped, W-doped, and Sb-doped ReSTe crystallized in a cubic MoSBr-type structure. All samples exhibited p-type thermoelectric properties. ReSTe and Re0.993W0.007STe exhibited the largest dimensionless figure of merit ZT, reaching 0.4 at 660 K. This high performance is attributed to a large power factor owing to the degenerate semiconducting state realized by the strong spin–orbit coupling and low lattice thermal conductivity of the sintered samples. Furthermore, electronic band dispersion of ReSTe is almost flat at the bottom of the conduction band, suggesting that n-type ReSTe is expected to exhibit much higher performance than p-type ReSTe.

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Article Details

Volume / Issue Vol. 126, Issue 24
Published June 16, 2025
ISSN 0003-6951
Publisher American Institute of Physics

Journal Info

Applied Physics Letters

American Institute of Physics
ISSN: 0003-6951 Physical Sciences

Authors (8)

H

Haruka Matsumoto

Department of Physics

H

Hiroto Isomura

Institute for Solid State Physics, The University of Tokyo 1 , Kashiwanoha 5-1-5, Kashiwa 277-8581,

K

Keita Kojima

Institute for Solid State Physics, The University of Tokyo 1 , Kashiwanoha 5-1-5, Kashiwa 277-8581,

R

Ryutaro Okuma

Institute for Solid State Physics, The University of Tokyo 1 , Kashiwanoha 5-1-5, Kashiwa 277-8581,

H

Hironori Ohshima

National Institute of Advanced Industrial Science and Technology (AIST) 2 , Tsukuba 305-8568,

C

Chul-Ho Lee

Laboratory Animal Resource Center

Y

Youichi Yamakawa

Department of Physics

Y

Yoshihiko Okamoto

Institute for Solid State Physics, The University of Tokyo 1 , Kashiwanoha 5-1-5, Kashiwa 277-8581,

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