Superconducting Fluctuations Above the Critical Temperature in Bi2Sr2Ca1−xYxCu2O8+δ as Revealed by Microwave Absorption


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Abstract

The superconducting fluctuations above the critical temperature in Bi2Sr2Ca1−xYxCu2O8+δ (x = 0–0.3) single crystals are studied by microwave absorption (MWA). The maximum in the MWA temperature dependence was observed close to the critical temperature. Its formation is explained by the change of the quasiparticle density of states due to superconducting fluctuations. The fluctuation area boundary is plotted on the phase diagram using the variation of the MWA temperature dependence with the hole density and is compared with the pseudogap phase behavior.

About the authors

I. Gimazov

Zavoisky Physical-Technical Institute

Author for correspondence.
Email: ubvfp94@mail.ru
ORCID iD: 0000-0002-6945-8509
Russian Federation, Sibirsky Tract 10/7, Kazan, 420029

Yu. Talanov

Zavoisky Physical-Technical Institute

Email: ubvfp94@mail.ru
Russian Federation, Sibirsky Tract 10/7, Kazan, 420029

V. Sakhin

Zavoisky Physical-Technical Institute

Email: ubvfp94@mail.ru
Russian Federation, Sibirsky Tract 10/7, Kazan, 420029

T. Adachi

Department of Engineering and Applied Sciences, Sophia University

Email: ubvfp94@mail.ru
Japan, 7-1 Kioi-cho, Chiyoda-ku, Tokyo, 102-8554

T. Noji

Department of Applied Physics, Tohoku University

Email: ubvfp94@mail.ru
Japan, 6-6-05 Aoba, Aramaki, Sendai, 980-8579

Y. Koike

Department of Applied Physics, Tohoku University

Email: ubvfp94@mail.ru
Japan, 6-6-05 Aoba, Aramaki, Sendai, 980-8579

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