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- W19552147 abstract "Frequency-dependent conductivity and phase-resolved harmonic-mixing studies are reported on alloys of the linear-chain compound (${mathrm{TaSe}}_{4}$${)}_{2}$I with Nb in the microwave and millimeter-wave spectral range. The frequency-dependent conductivity is evaluated in the charge-density-wave (CDW) state, and the collective-mode response is analyzed in terms of a harmonic-oscillator response with an effective mass ${mathit{m}}^{mathrm{*}}$, a pinning frequency ${mathrm{ensuremath{omega}}}_{0}$, and relaxation time ${mathrm{ensuremath{tau}}}^{mathrm{*}}$ as parameters. We find that the magnitude, temperature, and concentration dependence of the effective mass ${mathit{m}}^{mathrm{*}}$ is well described in terms of the mean-field description of the dynamical CDW response. The pinning frequency ${mathrm{ensuremath{omega}}}_{0}$ increases with increasing impurity concentration x, and the concentration dependence is suggestive of strong-impurity pinning. We also evaluate the temperature and concentration dependence of the relaxation time ${mathrm{ensuremath{tau}}}^{mathrm{*}}$, and compare this parameter with various models." @default.
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- W19552147 date "1991-03-15" @default.
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- W19552147 title "Charge-density-wave dynamics in (<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Ta</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi mathvariant=normal>−</mml:mi><mml:mi mathvariant=italic>x</mml:mi></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>Nb</mml:mi></mml:mrow><mml:…" @default.
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- W19552147 doi "https://doi.org/10.1103/physrevb.43.6315" @default.
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