Critical Fluctuations in the Microwave Complex Conductivity of BSCCO and YBCO Thin Films

D. -N. Peligrad; B. Nebendahl; M. Mehring; A. Dulcic

Critical Fluctuations in the Microwave Complex Conductivity of BSCCO and YBCO Thin Films

Superconductivity 2007-05-23 v2

Authors: D. -N. Peligrad , B. Nebendahl , M. Mehring , A. Dulcic

Abstract

Critical fluctuations above $T_c$ are studied in the microwave complex conductivity of BSCCO-2212, BSCCO-2223, and YBCO thin films. The analysis of the experimental data yields the temperature dependences of the reduced coherence length $\xi(T)/\xi_0$ . Two critical regimes are observed, having the static critical exponent $\nu=1$ close to $T_c$ , and a crosover to $\nu=2/3$ at higher temperatures. In more anisotropic superconductors the reduced coherence lengths are larger, and the critical states extend to higher temperatures.

Keywords

critical fluctuations microwave complex conductivity BSCCO YBCO coherence length critical exponent

Cite

@article{arxiv.cond-mat/0209176,
  title  = {Critical Fluctuations in the Microwave Complex Conductivity of BSCCO and YBCO Thin Films},
  author = {D. -N. Peligrad and B. Nebendahl and M. Mehring and A. Dulcic},
  journal= {arXiv preprint arXiv:cond-mat/0209176},
  year   = {2007}
}

Comments

4 pages, 3 figures

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