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 Chemistry & Nanoscience

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

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

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© 2023 American Physical Society.

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10.1103/PhysRevApplied.19.014034

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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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T1 - Enhanced Thermoelectric Performance by Resonant Doping and Embedded Magnetic Impurity

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.

UR - https://www.scopus.com/pages/publications/85146372307

U2 - 10.1103/PhysRevApplied.19.014034

DO - 10.1103/PhysRevApplied.19.014034

M3 - Article

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JO - Physical Review Applied

JF - Physical Review Applied

IS - 1

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ER -

Enhanced Thermoelectric Performance by Resonant Doping and Embedded Magnetic Impurity

Abstract

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