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Charge density glass from fictions to facts

机译:从虚构到事实的电荷密度玻璃

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摘要

Thirty years ago Fukuyama [J. Phys. Soc. Jpn.45 (1978) 1474] predicted a transition from charge density wave (CDW) state to the charge density glass (CDG) at a finite temperature as the consequence of the competition between the uniform commensurability pinning and the random impurity pinning. We present strong evidence that the CDG phase indeed exists as a generic feature of density wave systems. However, it arises from the competition of the random impurity pinning and the electrostatic intra-CDW interaction which tends to establish a uniform phase at low temperature. The glass transition occurs at the temperature at which the free carriers cannot efficiently screen the phase distortions. The characteristic length scale of the disorder, i.e. the size of the phase coherent domains, governs the glass properties.
机译:三十年前的福山[J.物理Soc。 Jpn.45(1978)1474]预测了由于均匀可比性钉扎和随机杂质钉扎之间的竞争,在有限的温度下从电荷密度波(CDW)到电荷密度玻璃(CDG)的转变。我们提供有力的证据,证明CDG相位确实作为密度波系统的通用特征而存在。然而,这是由于随机杂质钉扎和静电CDW内相互作用的竞争所引起的,在低温下趋于建立均匀相。玻璃化转变发生在自由载流子无法有效屏蔽相位畸变的温度下。无序的特征长度尺度,即相干相畴的大小,决定了玻璃的性能。

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