Abstract

In this study, we analyze the evolution of current-voltage characteristics of a quasi-one-dimensional TaS₃ conductor under uniaxial tension in the temperature range of 150–40 K. At all temperatures, elongation is found to lead to formation of an “ultracoherent” charge density wave (CDW) the main feature of which is a sharp increase in conductivity under an electric field that is higher than the threshold: above 100 K, the transition in the dependence on ε occurs almost abruptly while, below 90 K, elongation leads to an intermediate region in which the threshold field increases sharply and is poorly defined due to weak nonlinear conductivity. The result proves the occurrence of a spatially non-uniform state of the CDW below 90 K.

中文翻译：

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液氮温度下单轴拉伸对TaS 3中电荷密度波的非线性电导率和结构转变的影响

摘要

在这项研究中，我们分析了准一维TaS ₃导体在150–40 K的温度范围内在单轴张力下的电流-电压特性的演变。在所有温度下，发现伸长都会导致形成“ “超相干”电荷密度波（CDW）的主要特征是在高于阈值的电场下电导率急剧增加：高于100 K时，对ε的依赖性几乎突然发生转变，而低于90 K时，伸长导致产生一个中间区域，在该中间区域中，阈值场急剧增加，并且由于弱的非线性电导率而很难定义。结果证明了低于90 K的CDW在空间上不均匀状态的发生。