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

Scientific paper - Original scientific paper

• Author: D.-N. Peligrad
• Author: M. Mehring
• Author: Antonije Dulčić
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

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.

• Keywords (english): superconductivity; fluctuations; microwave conductivity
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical review B: Condensed matter and materials physics
• Numbering: vol. 67, no. 17, 174515
• p-ISSN: 1098-0121
• e-ISSN: 1550-235X
• DOI: https://doi.org/10.1103/PhysRevB.67.174515
• URN:NBN: urn:nbn:hr:217:061457
• Publication: 2003
• Document URL: http://link.aps.org/doi/10.1103/PhysRevB.67.174515
• Type of resource: Text
• Access conditions: Open access
• Public note: Copyright (2003) by the American Physical Society.
• Created on: 2019-10-13 16:49:32