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

European Physical Journal B

Volumn 27, Issue 4, 2002, Pages 497-504

  Silva, E ^a  

^a ROMA TRE UNIVERSITY   (Italy)

Author keywords

74.20.De Phenomenological theories (two fluid, Ginzburg Landau, etc.); 74.25.Nf Response to electromagnetic fields; 74.40.+k Fluctuations (noise, chaos, nonequilibrium superconductivity, localization, etc.)

Indexed keywords

EID: 0038132052     PISSN: 14346028     EISSN: None     Source Type: Journal    
DOI: 10.1140/epjb/e2002-00183-0     Document Type: Article

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54. 0
55. The convergence of the integral written in this form is assured when expansion for small fields is made in the subsequent steps of the calculation. The full expression is obviously convergent, see equation (4) in reference [38]. We thank T. Mishonov for bringing our attention to this point
56. 0
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58. As pointed out by other authors [5,9,15,28], this behaviour can easily mimic the appearance of dimensional crossovers
59. In fact, it is easy to derive an approximate expression for σ with w ≪ 1, from which both the extremely slow frequency dependence and the new approximate scaling are exploited
60. A scale factor would substantially improve the fit, at the expense of the introduction of an additional free parameter. Purpose of the present comparison with the data is to show that the proposed extension to the GL theory is in agreement with the experimental trends