Temperature dependence of the pseudogap in aluminum and praseodymium-doped YBa2Cu3O7-δ single crystals

被引：45

作者：

Vovk, R. V. ^{[1
]}

Obolenskii, M. A. ^{[1
]}

Zavgorodniy, A. A. ^{[1
]}

Lotnyk, D. A. ^{[1
]}

Kotvitskaya, K. A. ^{[1
]}

机构：

[1] Kharkov Natl Univ, Dept Phys, UA-61077 Kharkov, Ukraine

来源：

PHYSICA B-CONDENSED MATTER | 2009年 / 404卷 / 20期

关键词：

Pseudogap; BCS-BEC crossover; YBaCuO-based compounds; SUPERCONDUCTIVITY; YBCO;

D O I：

10.1016/j.physb.2009.05.047

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have investigated the conductivity in the basis plane of YBaCuO single crystals slightly doped by A] and Pr with a pre-specified topology of twin boundaries. The excess conductivity for the analyzed samples shows dependence Delta sigma similar to(1 - T/T*)exp(Delta(ab)*/T) in a wide temperature range T-f<T<T*,where T* is the mean field temperature of superconducting transition. The temperature dependence of the pseudogap can be satisfactorily described in terms of the BCS-BEC crossover theoretical model. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：3516 / 3518

页数：3

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