Contribution of charge-density-wave phase excitations to thermal conductivity below the Peierls transition.
Contribution of charge-density-wave phase excitations to thermal conductivity below the Peierls transition.
复制标题
电荷密度波相激发对 Peierls 转变以下热导率的贡献。
DOI：
10.1103/physrevb.48.4329
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
Artemenko
中科院分区：
文献类型：
--
作者：
Smontara;Biljakovic;Artemenko
We report on measurements of the thermal conductivity of the quasi-one-dimensional conductor (${\mathrm{NbSe}}_{4}$${)}_{10}$${\mathrm{I}}_{3}$ between 80 and 320 K. We show that the thermal conductivity exhibits a well-defined minimum below the Peierls transition temperature ${\mathit{T}}_{\mathit{p}}$=285 K. Such behavior has also been found in the charge-density-wave (CDW) conductors ${\mathrm{K}}_{0.3}$${\mathrm{MoO}}_{3}$ and (${\mathrm{TaSe}}_{4}$${)}_{2}$I, and seems to be a generic property of CDW systems. We propose that this feature results from the contribution of low-frequency phasons of rather large velocity. The position of the minimum in the thermal conductivity corresponds to the temperature range where the screening of the Coulomb interaction by the quasiparticles (electron-hole pairs) becomes effective and consequently enables the phason contribution.
We report on measurements of the thermal conductivity of the quasi-one-dimensional conductor (${\mathrm{NbSe}}_{4}$${)}_{10}$${\mathrm{I}}_{3}$ between 80 and 320 K. We show that the thermal conductivity exhibits a well-defined minimum below the Peierls transition temperature ${\mathit{T}}_{\mathit{p}}$=285 K. Such behavior has also been found in the charge-density-wave (CDW) conductors ${\mathrm{K}}_{0.3}$${\mathrm{MoO}}_{3}$ and (${\mathrm{TaSe}}_{4}$${)}_{2}$I, and seems to be a generic property of CDW systems. We propose that this feature results from the contribution of low-frequency phasons of rather large velocity. The position of the minimum in the thermal conductivity corresponds to the temperature range where the screening of the Coulomb interaction by the quasiparticles (electron-hole pairs) becomes effective and consequently enables the phason contribution.