Low-Frequency Current Fluctuations in Quasi-1D (TaSe4)2I Weyl Semimetal Nanoribbons

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

doi:10.1002/aelm.202200860

Low-Frequency Current Fluctuations in Quasi-1D (TaSe₄)₂I Weyl Semimetal Nanoribbons

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

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

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, S_I ~ 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.

Original language	English
Article number	2200860
Journal	Advanced Electronic Materials
Volume	9
Issue number	2
DOIs	https://doi.org/10.1002/aelm.202200860
State	Published - Feb 2023
Externally published	Yes

Funding

A.A.B. was supported by the Vannevar Bush Faculty Fellowship from the Office of Secretary of Defense (OSD) under the Office of Naval Research (ONR) contract N00014-21-1-2947. The work of T.T.S. and N.R.S. was supported by the subcontract of this ONR award. A.A.B. also acknowledges the support from the National Science Foundation (NSF) program Designing Materials to Revolutionize and Engineer the Future (DMREF) via a project DMR-1921958 entitled Collaborative Research: Data-Driven Discovery of Synthesis Pathways and Distinguishing Electronic Phenomena of 1D van der Waals Bonded Solids. S.R. was supported, in part, by the International Research Agendas program of the Foundation for Polish Science co-financed by the European Union under the European Regional Development Fund No. MAB/2018/9. A.A.B. was supported by the Vannevar Bush Faculty Fellowship from the Office of Secretary of Defense (OSD) under the Office of Naval Research (ONR) contract N00014‐21‐1‐2947. The work of T.T.S. and N.R.S. was supported by the subcontract of this ONR award. A.A.B. also acknowledges the support from the National Science Foundation (NSF) program Designing Materials to Revolutionize and Engineer the Future (DMREF) via a project DMR‐1921958 entitled Collaborative Research: Data‐Driven Discovery of Synthesis Pathways and Distinguishing Electronic Phenomena of 1D van der Waals Bonded Solids. S.R. was supported, in part, by the International Research Agendas program of the Foundation for Polish Science co‐financed by the European Union under the European Regional Development Fund No. MAB/2018/9.

Keywords

1/f noise
Weyl semimetals
charge-density-waves
nanoribbons
topological semimetals

Access to Document

10.1002/aelm.202200860

Cite this

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title = "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 \textasciitilde{} 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.",

keywords = "1/f noise, Weyl semimetals, charge-density-waves, nanoribbons, topological semimetals",

author = "Subhajit Ghosh and Fariborz Kargar and Sesing, \{Nick R.\} and Zahra Barani and Salguero, \{Tina T.\} and Dong Yan and Sergey Rumyantsev and Balandin, \{Alexander A.\}",

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AU - Ghosh, Subhajit

AU - Kargar, Fariborz

AU - Sesing, Nick R.

AU - Barani, Zahra

AU - Salguero, Tina T.

AU - Yan, Dong

AU - Rumyantsev, Sergey

AU - Balandin, Alexander A.

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N2 - 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.

AB - 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.

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