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- Title
Enhanced Electron Heat Conduction in TaS 3 1D Metal Wire.
- Authors
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
- Abstract
The 1D wire TaS3 exhibits metallic behavior at room temperature but changes into a semiconductor below the Peierls transition temperature (Tp), 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.
- Subjects
HEAT conduction; CONDUCTION electrons; THERMAL conductivity; TRANSITION temperature; ELECTRIC conductivity
- Publication
Materials (1996-1944), 2021, Vol 14, Issue 16, p4477
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma14164477