Enhanced Electron Heat Conduction in TaS3 1D Metal Wire

Title
Enhanced Electron Heat Conduction in TaS3 1D Metal Wire
Authors
김정원이호준방재욱박세환Dang Suan Dang사강원길강승수안병욱김기강임종태임성주
Issue Date
2021-08
Publisher
Materials
Citation
VOL 14, NO 16, 4477
Abstract
The 1D wire TaS 3 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 TaS 3 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 coef?cient of L 0 , known as the Lorenz number―that is, κ = σL o T. Our characterization of the thermal conductivity of metallic TaS 3 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 TaS 3 was approximately 12 times larger than predicted by W-F law, implying L = 12L 0 . This result implies the possibility of an existing heat conduction path that the Sommerfeld theory cannot account for.
URI
http://pubs.kist.re.kr/handle/201004/73579
ISSN
1996-1944
Appears in Collections:
KIST Publication > Article
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