Enhanced Thermoelectric Performance by Resonant Doping and Embedded Magnetic Impurity

Sujin Kim, Junphil Hwang, Tae Soo You, Seongbeom Yeon, Jungwon Kim, Byung Kyu Yu, Mi Kyung Han, Minju Lee, Somnath Acharya, Jiyong Kim, Woochul Kim, Sung Jin Kim

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

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.

Original languageEnglish
Article number014034
JournalPhysical Review Applied
Volume19
Issue number1
DOIs
StatePublished - Jan 2023

Bibliographical note

Funding Information:
This research is supported by the Pioneer Research Center Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (2022M3C1A309198811). This research is supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2021R1I1A1A01058838), and Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2021R1A6A1A10039823).

Publisher Copyright:
© 2023 American Physical Society.

Fingerprint

Dive into the research topics of 'Enhanced Thermoelectric Performance by Resonant Doping and Embedded Magnetic Impurity'. Together they form a unique fingerprint.

Cite this