quasi-1D material is defined as a Weyl semimetal with Weyl points located above and below the Fermi level, forming pairs with the opposite chiral charge. At temperatures below the Peierls transition temperature T P = 248-263 K, (TaSe 4 ) 2 I reveals the charge-density-wave (CDW) phase. [4,[8][9][10][11][12][13] The quantum CDW phase consists of a periodic modulation of the electronic charge density accompanied by a periodic distortion of the atomic lattice. [14][15][16][17][18][19] It has been suggested that (TaSe 4 ) 2 I reveals a correlated topological phase, which arises from the formation of CDW in a Weyl semimetal. [11,12] This quasi-1D quantum material represents an interesting avenue for exploring the interplay of correlations and topology, as well as being an exciting system for examining new functionalities and electronic applications. [17,20] There are interesting applied physics and electronic materials aspects in the research of topological semimetals. The resistance and current density bottlenecks in downscaled metal interconnect motivate the search for new materials for the back end of the line (BEOL) interconnect applications. [21,22] When the interconnect linewidth scales below the electron mean free path, its resistivity increases in a power-law function due to Low-frequency current fluctuations, i.e., electronic noise, in quasi-1D (TaSe 4 ) 2 I Weyl semimetal nanoribbons are discussed. It is found that the noise spectral density is of the 1/f type and scales with the square of the current, S I ~ 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 are 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 is surprisingly low, ≈10 −9 µm 2 Hz −1 at f = 10 Hz, when measured below and above the Peierls transition temperature. The 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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