Results of investigating the temperature dependences of the surface impedance Z(T) = R(T) + iX(T) and complex conductivity σ(T) = σ’(T)-iσ’’(T) in the ab-planes and along the c-axis of high-T_c superconductors (HTSCs) are reviewed and critically analyzed. An electrodynamic method is considered for extracting all components of σ(T) and Z(T) tensors from quantities measured in microwave experiments. The main attention is focused on the evolution of Z(T) and σ(T) dependences in a YBa₂Cu₃O_7-x crystal with the oxygen content variation. Possible mechanisms of conductivity are discussed in the framework of models for normal, superconducting, and pseudogap states of HTSCs.

PACS: 74.20.De, 74.25.Dw, 74.25.Fy, 74.25.Nf, 74.72.−h (all) DOI: 10.1070/PU2005v048n10ABEH005560 URL: https://ufn.ru/en/articles/2005/10/a/ 000235238900001 Citation: Trunin M R "Conductivity anisotropy and pseudogap in the microwave response of high-Tc superconductors" Phys. Usp. 48 979–998 (2005) BibTexBibNote ® (generic)BibNote ® (RIS)MedlineRefWorks Оригинал: Трунин М Р «Анизотропия проводимости и псевдощель в микроволновом отклике высокотемпературных сверхпроводников» УФН 175 1017–1037 (2005); DOI: 10.3367/UFNr.0175.200510a.1017