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

doi:10.1103/PhysRevApplied.19.014034

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

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

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 language	English
Article number	014034
Journal	Physical Review Applied
Volume	19
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevApplied.19.014034
Publication status	Published - 2023 Jan

Bibliographical note

Publisher Copyright:
© 2023 American Physical Society.

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevApplied.19.014034

Cite this

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title = "Enhanced Thermoelectric Performance by Resonant Doping and Embedded Magnetic Impurity",

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.",

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

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doi = "10.1103/PhysRevApplied.19.014034",

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AU - Kim, Sujin

AU - Hwang, Junphil

AU - You, Tae Soo

AU - Yeon, Seongbeom

AU - Kim, Jungwon

AU - Yu, Byung Kyu

AU - Han, Mi Kyung

AU - Lee, Minju

AU - Acharya, Somnath

AU - Kim, Jiyong

AU - Kim, Woochul

AU - Kim, Sung Jin

PY - 2023/1

Y1 - 2023/1

N2 - 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.

AB - 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.

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Enhanced Thermoelectric Performance by Resonant Doping and Embedded Magnetic Impurity

Abstract

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