Enhanced Electron Heat Conduction in TaS3 1D Metal Wire

Yi, Hojoon; Bahng, Jaeuk; Park, Sehwan; Dang, Dang Xuan; Sakong, Wonkil; Kang, Seungsu; Ahn, Byung-wook; Kim, Jungwon; Kim, Ki Kang; Lim, Jong Tae; Lim, Seong Chu

doi:10.3390/ma14164477

Open AccessArticle

Enhanced Electron Heat Conduction in TaS₃ 1D Metal Wire

by

Hojoon Yi

¹

,

Jaeuk Bahng

²,

Sehwan Park

^1,3

,

Dang Xuan Dang

¹,

Wonkil Sakong

^1,3,

Seungsu Kang

¹,

Byung-wook Ahn

^1,3,

Jungwon Kim

⁴

,

Ki Kang Kim

^1,3,

Jong Tae Lim

^5,* and

Seong Chu Lim

^1,2,*

¹

Department of Energy Science, Sungkyunkwan University, Suwon 16419, Korea

²

Department of Smart Fab. Technology, Sungkyunkwan University, Suwon 16419, Korea

³

Center for Integrated Nanostructure Physics, Institute for Basic Science, Sungkyunkwan University, Suwon 16419, Korea

⁴

Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Chudong-ro, Bongdong-eub, Seoul 55324, Korea

⁵

Reality Devices Research Division, Electronics and Telecommunications Research Institute, Daejeon 34129, Korea

^*

Authors to whom correspondence should be addressed.

Materials 2021, 14(16), 4477; https://doi.org/10.3390/ma14164477

Submission received: 19 July 2021 / Revised: 5 August 2021 / Accepted: 6 August 2021 / Published: 10 August 2021

(This article belongs to the Topic Multiple Application for Novel and Advanced Materials)

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Abstract

The 1D wire TaS₃ exhibits metallic behavior at room temperature but changes into a semiconductor below the Peierls transition temperature (T_p), near 210 K. Using the 3ω method, we measured the thermal conductivity

κ

of TaS₃ as a function of temperature. Electrons dominate the heat conduction of a metal. The Wiedemann–Franz law states that the thermal conductivity

κ

of a metal is proportional to the electrical conductivity σ with a proportional coefficient of L₀, known as the Lorenz number—that is,

κ = σ L_{o} T

. Our characterization of the thermal conductivity of metallic TaS₃ reveals that, at a given temperature T, the thermal conductivity κ is much higher than the value estimated in the Wiedemann–Franz (W-F) law. The thermal conductivity of metallic TaS₃ was approximately 12 times larger than predicted by W-F law, implying

L = 12 L_{0}

. This result implies the possibility of an existing heat conduction path that the Sommerfeld theory cannot account for.

Keywords: Peierls transition; charge density wave; heat conduction; Wiedemann–Franz law; Lorenz number

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MDPI and ACS Style

Yi, H.; Bahng, J.; Park, S.; Dang, D.X.; Sakong, W.; Kang, S.; Ahn, B.-w.; Kim, J.; Kim, K.K.; Lim, J.T.; et al. Enhanced Electron Heat Conduction in TaS₃ 1D Metal Wire. Materials 2021, 14, 4477. https://doi.org/10.3390/ma14164477

AMA Style

Yi H, Bahng J, Park S, Dang DX, Sakong W, Kang S, Ahn B-w, Kim J, Kim KK, Lim JT, et al. Enhanced Electron Heat Conduction in TaS₃ 1D Metal Wire. Materials. 2021; 14(16):4477. https://doi.org/10.3390/ma14164477

Chicago/Turabian Style

Yi, Hojoon, Jaeuk Bahng, Sehwan Park, Dang Xuan Dang, Wonkil Sakong, Seungsu Kang, Byung-wook Ahn, Jungwon Kim, Ki Kang Kim, Jong Tae Lim, and et al. 2021. "Enhanced Electron Heat Conduction in TaS₃ 1D Metal Wire" Materials 14, no. 16: 4477. https://doi.org/10.3390/ma14164477

APA Style

Yi, H., Bahng, J., Park, S., Dang, D. X., Sakong, W., Kang, S., Ahn, B.-w., Kim, J., Kim, K. K., Lim, J. T., & Lim, S. C. (2021). Enhanced Electron Heat Conduction in TaS₃ 1D Metal Wire. Materials, 14(16), 4477. https://doi.org/10.3390/ma14164477

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Enhanced Electron Heat Conduction in TaS₃ 1D Metal Wire

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