Frequency pulling and heterodyning observed in voltage spectrum of the Fröhlich conductor NbSe3

N. P. Ong; C. M. Gould

doi:10.1016/0038-1098(81)90881-4

Frequency pulling and heterodyning observed in voltage spectrum of the Fröhlich conductor NbSe₃

N. P. Ong, C. M. Gould

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

16 Scopus citations

Abstract

The voltage power spectrum of NbSe₃ has been studied in the upper charge-density wave (CDW) state where only one CDW exists. In the non-Ohmic regime sharp spikes appear in the spectrum. The frequency of these spikes increases monotonically with current as in the lower CDW state. We study the "fine structure" of the spectrum and find evidence for "frequency pulling" between the modes. A linear coupled-mode treatment is used to model this effect. There is also evidence of heterodyning of an intrinsic (current independent) 2MHz mode. We briefly discuss these phenomena in terms of Fröhlich sliding conductivity. Difficulties with the simple two-fluid model as well as models based on solid state turbulence are pointed out.

Original language	English (US)
Pages (from-to)	25-31
Number of pages	7
Journal	Solid State Communications
Volume	37
Issue number	1
DOIs	https://doi.org/10.1016/0038-1098(81)90881-4
State	Published - Jan 1981
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Chemistry
Condensed Matter Physics
Materials Chemistry

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10.1016/0038-1098(81)90881-4

Cite this

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title = "Frequency pulling and heterodyning observed in voltage spectrum of the Fr{\"o}hlich conductor NbSe3",

abstract = "The voltage power spectrum of NbSe3 has been studied in the upper charge-density wave (CDW) state where only one CDW exists. In the non-Ohmic regime sharp spikes appear in the spectrum. The frequency of these spikes increases monotonically with current as in the lower CDW state. We study the {"}fine structure{"} of the spectrum and find evidence for {"}frequency pulling{"} between the modes. A linear coupled-mode treatment is used to model this effect. There is also evidence of heterodyning of an intrinsic (current independent) 2MHz mode. We briefly discuss these phenomena in terms of Fr{\"o}hlich sliding conductivity. Difficulties with the simple two-fluid model as well as models based on solid state turbulence are pointed out.",

author = "Ong, {N. P.} and Gould, {C. M.}",

note = "Funding Information: and J.W. Brill. This work was supported by an NSF grant DMR7905418. We thank Professor Elsa Garmire and the USC Laser Center for the loan of the spectrum analyzer.",

year = "1981",

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doi = "10.1016/0038-1098(81)90881-4",

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T1 - Frequency pulling and heterodyning observed in voltage spectrum of the Fröhlich conductor NbSe3

AU - Ong, N. P.

AU - Gould, C. M.

N1 - Funding Information: and J.W. Brill. This work was supported by an NSF grant DMR7905418. We thank Professor Elsa Garmire and the USC Laser Center for the loan of the spectrum analyzer.

PY - 1981/1

Y1 - 1981/1

N2 - The voltage power spectrum of NbSe3 has been studied in the upper charge-density wave (CDW) state where only one CDW exists. In the non-Ohmic regime sharp spikes appear in the spectrum. The frequency of these spikes increases monotonically with current as in the lower CDW state. We study the "fine structure" of the spectrum and find evidence for "frequency pulling" between the modes. A linear coupled-mode treatment is used to model this effect. There is also evidence of heterodyning of an intrinsic (current independent) 2MHz mode. We briefly discuss these phenomena in terms of Fröhlich sliding conductivity. Difficulties with the simple two-fluid model as well as models based on solid state turbulence are pointed out.

AB - The voltage power spectrum of NbSe3 has been studied in the upper charge-density wave (CDW) state where only one CDW exists. In the non-Ohmic regime sharp spikes appear in the spectrum. The frequency of these spikes increases monotonically with current as in the lower CDW state. We study the "fine structure" of the spectrum and find evidence for "frequency pulling" between the modes. A linear coupled-mode treatment is used to model this effect. There is also evidence of heterodyning of an intrinsic (current independent) 2MHz mode. We briefly discuss these phenomena in terms of Fröhlich sliding conductivity. Difficulties with the simple two-fluid model as well as models based on solid state turbulence are pointed out.

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Frequency pulling and heterodyning observed in voltage spectrum of the Fröhlich conductor NbSe₃

Abstract

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