Dielectric constant and threshold electric field of charge-density-waves with strong impurity pinning |
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Authors: | PF Tua J Ruvalds |
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Institution: | Department of Physics, University of Virginia, Charlottesville, Virginia 22901 U.S.A. |
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Abstract: | The dielectric constant ε and the threshold electric field ET for the onset of charge-density-wave conduction are investigated within the phenomenological model proposed by Tua and Zawadowski for the strong pinning regime. The static dielectric constant ε (E) in a bias electric field E is found to be almost independent of E provided that E is not too close to ET. For relatively small values of the pinning strength, the product ε ET becomes independent of the parameters of the theory. Good agreement is found with the available experimental data on NbSe3 for the case of strong pinning obtained by radiation damage. |
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