A quieter state of charge and ultra-low-noise of the collective current in quasi-1D charge-density-wave nanowires

Subhajit Ghosh; Nicholas Sesing; Zahra Ebrahim Nataj; Tina Salguero; Sergey Rumyantsev; Roger K. Lake; Alexander A. Balandin

doi:10.1038/s41467-025-67567-x

A quieter state of charge and ultra-low-noise of the collective current in quasi-1D charge-density-wave nanowires

Subhajit Ghosh
, Nicholas Sesing
, Zahra Ebrahim Nataj
, Tina Salguero
, Sergey Rumyantsev
, Roger K. Lake
, Alexander A. Balandin

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

2 Scopus citations

Abstract

Electronic flicker noise limits phase stability in communication systems, reduces the sensitivity and selectivity of sensors, and degrades coherence in quantum devices. There is a strong need for unconventional materials and strategies for achieving ultra-low-noise performance in nanoscale and quantum electronics. Here, we demonstrate that in nanowires of the quasi-one-dimensional, fully gapped charge-density-wave material (TaSe₄)₂I, low-frequency electronic noise is suppressed below the limit of thermalized charge carriers in passive resistors. When the current is dominated by the sliding Frohlich condensate, the normalized noise spectral density, SI/I2, decreases linearly with current, I — a striking departure from the constant value of SI/I2, observed in conventional conductors. No residual minimum noise level is reached for the current of the electron-lattice condensate in (TaSe₄)₂I nanowires. Repeating the measurements for another charge-density wave conductor, NbS₃-II, we found a similar reduction below the normal electron limit at room temperature. Our findings signal intrinsically lower current fluctuations within a correlated electron transport regime.

Original language	English
Article number	116
Journal	Nature Communications
Volume	17
Issue number	1
DOIs	https://doi.org/10.1038/s41467-025-67567-x
State	Published - Dec 2026
Externally published	Yes

Funding

The work at UCLA was supported by the Vannevar Bush Faculty Fellowship (VBFF) to A.A.B. under the Office of Naval Research (ONR) contract N00014-21-1-2947 on One-Dimensional Quantum Materials. The work at UCR and the University of Georgia was supported, in part, via the subcontracts of the ONR project N00014-21-1-2947. HRTEM was performed using the JEOL 2100PLUS microscope, acquired with funding from the National Institutes of Health through grant 1S10OD034282-01. S.R. acknowledges partial support by the European Research Council (ERC) Project No. 101053716. The authors acknowledge useful discussions with M. Taheri and J. Brown at UCLA. The nanofabrication of the test structures was performed in the California NanoSystems Institute (CNSI).

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title = "A quieter state of charge and ultra-low-noise of the collective current in quasi-1D charge-density-wave nanowires",

abstract = "Electronic flicker noise limits phase stability in communication systems, reduces the sensitivity and selectivity of sensors, and degrades coherence in quantum devices. There is a strong need for unconventional materials and strategies for achieving ultra-low-noise performance in nanoscale and quantum electronics. Here, we demonstrate that in nanowires of the quasi-one-dimensional, fully gapped charge-density-wave material (TaSe4)2I, low-frequency electronic noise is suppressed below the limit of thermalized charge carriers in passive resistors. When the current is dominated by the sliding Frohlich condensate, the normalized noise spectral density, SI/I2, decreases linearly with current, I {\textemdash} a striking departure from the constant value of SI/I2, observed in conventional conductors. No residual minimum noise level is reached for the current of the electron-lattice condensate in (TaSe4)2I nanowires. Repeating the measurements for another charge-density wave conductor, NbS3-II, we found a similar reduction below the normal electron limit at room temperature. Our findings signal intrinsically lower current fluctuations within a correlated electron transport regime.",

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AU - Ghosh, Subhajit

AU - Sesing, Nicholas

AU - Nataj, Zahra Ebrahim

AU - Salguero, Tina

AU - Rumyantsev, Sergey

AU - Lake, Roger K.

AU - Balandin, Alexander A.

PY - 2026/12

Y1 - 2026/12

N2 - Electronic flicker noise limits phase stability in communication systems, reduces the sensitivity and selectivity of sensors, and degrades coherence in quantum devices. There is a strong need for unconventional materials and strategies for achieving ultra-low-noise performance in nanoscale and quantum electronics. Here, we demonstrate that in nanowires of the quasi-one-dimensional, fully gapped charge-density-wave material (TaSe4)2I, low-frequency electronic noise is suppressed below the limit of thermalized charge carriers in passive resistors. When the current is dominated by the sliding Frohlich condensate, the normalized noise spectral density, SI/I2, decreases linearly with current, I — a striking departure from the constant value of SI/I2, observed in conventional conductors. No residual minimum noise level is reached for the current of the electron-lattice condensate in (TaSe4)2I nanowires. Repeating the measurements for another charge-density wave conductor, NbS3-II, we found a similar reduction below the normal electron limit at room temperature. Our findings signal intrinsically lower current fluctuations within a correlated electron transport regime.

AB - Electronic flicker noise limits phase stability in communication systems, reduces the sensitivity and selectivity of sensors, and degrades coherence in quantum devices. There is a strong need for unconventional materials and strategies for achieving ultra-low-noise performance in nanoscale and quantum electronics. Here, we demonstrate that in nanowires of the quasi-one-dimensional, fully gapped charge-density-wave material (TaSe4)2I, low-frequency electronic noise is suppressed below the limit of thermalized charge carriers in passive resistors. When the current is dominated by the sliding Frohlich condensate, the normalized noise spectral density, SI/I2, decreases linearly with current, I — a striking departure from the constant value of SI/I2, observed in conventional conductors. No residual minimum noise level is reached for the current of the electron-lattice condensate in (TaSe4)2I nanowires. Repeating the measurements for another charge-density wave conductor, NbS3-II, we found a similar reduction below the normal electron limit at room temperature. Our findings signal intrinsically lower current fluctuations within a correlated electron transport regime.

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A quieter state of charge and ultra-low-noise of the collective current in quasi-1D charge-density-wave nanowires

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