Surface Physics Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700 064, India.
J Phys Condens Matter. 2010 May 5;22(17):175301. doi: 10.1088/0953-8984/22/17/175301. Epub 2010 Apr 12.
The electronic transport properties of ultra-low doped conducting polymer nanowires exhibit characteristics of a pinned one-dimensional Wigner crystal (1D WC) due to the long range electron-electron interaction at low temperature (<30 K). These wires also show characteristics of three-dimensional variable range hopping (3D VRH) at higher temperature. Here we report a resistivity study of these nanowires as a function of the bias around and above 30 K, to show that a crossover takes place from 3D VRH to power law behavior as the bias voltage or current is increased from a low to a relatively high value. The experimental results for this temperature range show several similarities to the theoretically predicted properties of disordered Lüttinger liquid, though at lower temperature the characteristics of the 1D WC are obtained for these nanowires.
超低掺杂导电聚合物纳米线的电子输运性质由于低温（<30 K）下长程电子-电子相互作用而表现出固定一维维格纳晶体（1D WC）的特征。这些纳米线在较高温度下也表现出三维变程跳跃（3D VRH）的特征。在这里，我们报告了这些纳米线在 30 K 左右和以上的偏压下的电阻率研究，结果表明，当偏压或电流从低到相对高的值增加时，从 3D VRH 到幂律行为发生交叉。对于这个温度范围的实验结果与无序 Luttinger 液体的理论预测性质有几个相似之处，尽管在较低的温度下，这些纳米线的 1D WC 特征是获得的。
