Enhanced Thermoelectric Performance by Resonant Doping and Embedded Magnetic Impurity
- 주제(기타) Physics, Applied
- 설명문(일반) [Kim, Sujin; Hwang, Junphil; Yu, Byung-Kyu; Han, Mi-Kyung; Lee, Minju; Kim, Sung-Jin] Ewha Womans Univ, Dept Chem & Nano Sci, Seoul 120750, South Korea; [Hwang, Junphil] Korea Construction Equipment Technol Inst KOCETI, Green Energy R&D Div, Jeonbuk 54004, South Korea; [Yeon, Seongbeom] Chungbuk Natl Univ, Dept Chem, Four Res Team BK21, Cheongju 28644, Chungbuk, South Korea; [Kim, Jungwon] Korea Inst Sci & Technol KIST, Inst Adv Composite Mat, Jeonbuk 55324, South Korea; [Acharya, Somnath; Kim, Jiyong; Kim, Woochul] Yonsei Univ, Sch Mech Engn, Seoul 120749, South Korea
- 등재 SCIE, SCOPUS
- 발행기관 AMER PHYSICAL SOC
- 발행년도 2023
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000205862
- 본문언어 영어
- Published As https://doi.org/10.1103/PhysRevApplied.19.014034
초록/요약
The thermoelectric energy-conversion efficiency is significantly enhanced by introducing magnetism. Doping Cr atoms in a Cu2SnS3(CTS) matrix modifies the electron density of state (e-DOS) and causes a special electron-transport mechanism by localized impurity spin moments. The localized spin moments cause a spin-spin exchange interaction with the spin of itinerant electrons of the CTS matrix. This is clearly verified in M -T measurement, which deviated from Curie's law. The figure of merit (zT) of the magnetic nanocomposite was 8 times higher than that of pristine CTS by the synergetic effect of modifying e-DOS near the Fermi level and electron transport by localized spin moments.
more