Short Wavelength Cutoff Effects in the AC Fluctuation Conductivity of Superconductors

Abstract

The short wavelength cutoff has been introduced in the calculation of 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 phi of the complex conductivity (tan(phi)=sigma_2/sigma_1) beyond pi/4 at T_c. Detailed expressions containing all essential parameters are derived for 3D isotropic and anisotropic fluctuation conductivity. In the 2D case we obtain individual expressions for the fluctuation conductivity for each term in the sum over discrete wavevectors perpendicular to the film plane.

12 pages, 9 figures

References in corpus (1)

• Frequency-dependent fluctuational conductivity above Tc in anisotropic superconductors: effects of a short wavelength cutoff

Cited by in corpus (5)

• Temperature range of superconducting fluctuations above T_c in YBa_2Cu_3O_{7-δ} single crystals
• Emergence of superconductivity in the cuprates via a universal percolation process
• Critical fluctuations and pseudogap observed in the microwave conductivity of BSCCO and YBCO thin films
• Microwave fluctuational conductivity in YBa${}_2$Cu${}_3$O${}_{7-\delta }$
• Comment on 'Temperature range of superconducting fluctuations above $T_c$ in YBa${}_2$Cu${}_3$O${}_{7-\delta }$ single crystals'