Enhanced Electron Heat Conduction in TaS3 1D Metal Wire
- Enhanced Electron Heat Conduction in TaS3 1D Metal Wire
- 김정원; 이호준; 방재욱; 박세환; Dang Suan Dang; 사강원길; 강승수; 안병욱; 김기강; 임종태; 임성주
- Issue Date
- VOL 14, NO 16, 4477
- 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.
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