Low‐Frequency Current Fluctuations in Quasi‐1D (TaSe4)2I Weyl Semimetal Nanoribbons
Abstract
Low‐frequency current fluctuations, i.e., electronic noise, in quasi‐1D (TaSe4)2I 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, SI ~ I2 (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 (TaSe4)2I crystals. The noise level, normalized by the channel area, in these Weyl semimetal nanoribbons is surprisingly low, ≈10−9 µm2 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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 20, 2022
- Source ID
- 10.1002/aelm.202200860
Entities
People
- Alexander A. Balandin
- Dong Yan
- Fariborz Kargar
- Nicholas Sesing
- Sergey Rumyantsev
- Subhajit Ghosh
- Tina T Salguero
- Zahra Barani
Organizations
- European Commission
- European Regional Development Fund
- National Science Foundation
- Office of Naval Research
- Polish Academy of Sciences
- University of California
- University of California, Riverside
- University of Georgia