Low-Frequency Noise in Quasi-1D (TaSe$_4$)$_2$I Weyl Semimetal Nanoribbons

Subhajit Ghosh; Fariborz Kargar; Nick R. Sesing; Zahra Barani; Tina T. Salguero; Dong Yan; Sergey Rumyantsev; Alexander A. Balandin

arXiv · 2208.06476

Low-Frequency Noise in Quasi-1D (TaSe$_4$)$_2$I Weyl Semimetal Nanoribbons

Subhajit Ghosh·Fariborz Kargar·Nick R. Sesing·Zahra Barani·Tina T. Salguero·Dong Yan·Sergey Rumyantsev·Alexander A. Balandin

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Abstract

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.

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Subhajit Ghosh, Fariborz Kargar, Nick R. Sesing, Zahra Barani, Tina T. Salguero, Dong Yan, Sergey Rumyantsev, Alexander A. Balandin. 2022-08-12. Low-Frequency Noise in Quasi-1D (TaSe$_4$)$_2$I Weyl Semimetal Nanoribbons. https://arxiv.org/abs/2208.06476

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