论文标题
准1D中的低频噪声（tase $ _4 $）$ _ 2 $ i weyl semimetal nanoribbons
Low-Frequency Noise in Quasi-1D (TaSe$_4$)$_2$I Weyl Semimetal Nanoribbons
论文作者
论文摘要
我们报告了低频电流波动，即电子噪声，以准二维（tase $ _4 $）$ _ 2 $ i Weyl Semimetal nanoribbons。发现噪声光谱密度为1/f类型，并具有电流的平方S〜I^2（f是频率）。噪声频谱密度几乎增加了一个数量级，并在温度T〜225 K附近发展了Lorentzian特征。这些光谱变化归因于电荷密度波相变的归因于噪声的温度最大温度与所报道的PEIERLS散装温度相差（Tase $ _4 $ _4 $）$ _ 2 $ _ 2 $ I CRYSTALS。噪声水平由通道区域归一化，在这些Weyl Semimetal Nanoribbons中，$ \ sim 10^{ - 9} $ $ $ $ $ $ $ $ $ $ $ $^2 $ hz $^{ - 1} $在f = 10 Hz下，当PEIERLS过渡温度下方和上方测量时。获得的结果揭示了准1D拓扑Weyl半学中电子传输的细节，对于它们作为缩小的互连的应用可能很重要。
We report on low-frequency current fluctuations, i.e. electronic noise, in quasi-one-dimensional (TaSe$_4$)$_2$I Weyl semimetal nanoribbons. It was found that the noise spectral density is of the 1/f type and scales with the square of the current, S~I^2 (f is the frequency). The noise spectral density increases by almost an order of magnitude and develops Lorentzian features near the temperature T~225 K. These spectral changes were attributed to the charge-density-wave phase transition even though the temperature of the noise maximum deviates from the reported Peierls transition temperature in bulk (TaSe$_4$)$_2$I crystals. The noise level, normalized by the channel area, in these Weyl semimetal nanoribbons was surprisingly low, $\sim 10^{-9}$ um$^2$Hz$^{-1}$ at f=10 Hz, when measured below and above the Peierls transition temperature. Obtained results shed light on the specifics of electron transport in quasi-1D topological Weyl semimetals and can be important for their proposed applications as downscaled interconnects.
