Low-energy excitations in the one-dimensional conductor K2Pt(CN)4Br0.3
Low-energy excitations in the one-dimensional conductor K2Pt(CN)4Br0.3
复制标题
一维导体 K2Pt(CN)4Br0.3 中的低能激发
DOI：
10.1103/physrevb.46.1326
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
Biljakovic
中科院分区：
文献类型：
--
作者：
Odin;Lasjaunias;Berton;Monceau;Biljakovic
We present specific-heat data of ${\mathrm{K}}_{2}$Pt(CN${)}_{4}$${\mathrm{Br}}_{0.3}$\ensuremath{\cdot}3.2(${\mathrm{D}}_{2}$O) in the temperature range from 0.1 to 30 K. We analyze various contributions in excess to that of phonons and relate them to the presence of a charge-density wave (CDW) in this quasi-one-dimensional compound: low-energy excitations, predominant below 0.5 K with a temperature dependence in ${\mathit{T}}^{0.5}$, and an excess ${\mathit{C}}_{\mathit{p}}$/${\mathit{T}}^{3}$ contribution centered around 7 K that we ascribe to phase-mode excitations of the CDW. The phonon contribution follows a slightly subcubic variation in ${\mathit{T}}^{2.8}$, revealing a large anisotropy in the force constants. Contrary to the case of other charge-density-wave compounds, no aging effects in the energy relaxation were detected.
We present specific-heat data of ${\mathrm{K}}_{2}$Pt(CN${)}_{4}$${\mathrm{Br}}_{0.3}$\ensuremath{\cdot}3.2(${\mathrm{D}}_{2}$O) in the temperature range from 0.1 to 30 K. We analyze various contributions in excess to that of phonons and relate them to the presence of a charge-density wave (CDW) in this quasi-one-dimensional compound: low-energy excitations, predominant below 0.5 K with a temperature dependence in ${\mathit{T}}^{0.5}$, and an excess ${\mathit{C}}_{\mathit{p}}$/${\mathit{T}}^{3}$ contribution centered around 7 K that we ascribe to phase-mode excitations of the CDW. The phonon contribution follows a slightly subcubic variation in ${\mathit{T}}^{2.8}$, revealing a large anisotropy in the force constants. Contrary to the case of other charge-density-wave compounds, no aging effects in the energy relaxation were detected.