Short-wavelength cutoff effects in the ac fluctuation conductivity of superconductors

Peligrad, D.-N. and Mehring, M. and Dulčić, Antonije (2003) Short-wavelength cutoff effects in the ac fluctuation conductivity of superconductors. Physical Review B, 67 (17). pp. 174515-13. ISSN 1098-0121

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Abstract

The short-wavelength cutoff has been introduced in the calculation of the ac fluctuation conductivity of superconductors. It is shown that a finite cutoff leads to a breakdown of the scaling property in frequency and temperature. Also, it increases the phase φ of the complex conductivity (tanφ=σ2/σ1) beyond π/4 at Tc. Detailed expressions containing all essential parameters are derived for three-dimensional isotropic and anisotropic fluctuation conductivity. In the two-dimensional case we obtain individual expressions for the fluctuation conductivity for each term in the sum over discrete wave vectors perpendicular to the film plane. A comparison of the theory to the experimental microwave fluctuation conductivity is provided.

Item Type: Article
Keywords: The short-wavelength cutoff has been introduced in the calculation of the ac fluctuation conductivity of superconductors. It is shown that a finite cutoff leads to a breakdown of the scaling property in frequency and temperature. Also, it increases the phase of the complex conductivity (tan = 2/1) beyond /4 at Tc. Detailed expressions containing all essential parameters are derived for three-dimensional isotropic and anisotropic fluctuation conductivity. In the two-dimensional case we obtain individual expressions for the fluctuation conductivity for each term in the sum over discrete wave vectors perpendicular to the film plane. A comparison of the theory to the experimental microwave fluctuation conductivity is provided.
Date: May 2003
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2003) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 23 May 2014 13:32
Last Modified: 23 May 2014 13:32
URI: http://digre.pmf.unizg.hr/id/eprint/1656

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