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- W2007389000 abstract "We demonstrate that extremely thin (<1 ensuremath{mu}m thick) samples of the charge-density-wave (CDW) conductor ${mathrm{K}}_{0.3}$${mathrm{MoO}}_{3}$ display high-quality narrow-band noise spectra when driven by a dc electric field. In the presence of combined dc and large-amplitude ac fields, the CDW becomes mode locked to the external signal, giving rise to Shapiro steps in the dc I-V characteristics. In the presence of combined dc and small-amplitude ac fields, distinct resonance features in the complex ac conductivity ensuremath{sigma}(ensuremath{omega}) are observed whenever the internal and external frequencies coincide. Analysis of the Shapiro-step interference suggests that the ac-dc interference arises from a direct coupling between the driving fields and the low-frequency dielectric relaxation mode in ${mathrm{K}}_{0.3}$${mathrm{MoO}}_{3}$. Resonances in the ac conductivity are shown to be analogous to those present in a phase-shifted resonant harmonic oscillator. Both noise and interference experiments yield a ratio between the narrow-band noise frequency and the CDW current-density of ${f}_{mathrm{NBN}/{J}_{mathrm{CDW}}}$=12ifmmodepmelsetextpmfi{}3 kHz ${mathrm{cm}}^{2}$/A, suggesting that the intrinsic pinning potential in ${mathrm{K}}_{0.3}$${mathrm{MoO}}_{3}$ has a periodicity equal to the CDW wavelength." @default.
- W2007389000 created "2016-06-24" @default.
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- W2007389000 date "1989-02-15" @default.
- W2007389000 modified "2023-10-14" @default.
- W2007389000 title "Noise and ac-dc interference phenomena in the charge-density-wave conductor<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>K</mml:mi></mml:mrow><mml:mrow><mml:mn>0.3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>MoO</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow…" @default.
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- W2007389000 doi "https://doi.org/10.1103/physrevb.39.3026" @default.
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