Effect of electron irradiation on excess conductivity of single Y1Ba2Cu3O7-delta crystals

被引：0

作者：

Azarenkov, N. A. ^{[1
]}

Voevodin, V. N. ^{[1
,2
]}

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

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

Khadzhai, G. Ya ^{[1
]}

Sklyar, V. V. ^{[1
]}

机构：

[1] V Karazin Khark Natl Univ, 4 Svobody Sq, UA-61022 Kharkov, Ukraine

[2] NSC KIPT, Inst Solid State Phys Mat Sci & Technol, 1 Akad St, UA-61108 Kharkov, Ukraine

来源：

FUNCTIONAL MATERIALS | 2018年 / 25卷 / 02期

关键词：

excess conductivity; electron irradiation; YBaCuO single crystals; crossover;

D O I：

10.15407/fm25.02.234

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Effect of electron irradiation on the excess conductivity of YBa2Cu3O7-delta single crystals is investigated. It is shown that irradiation with electrons leads to significant expansion of the temperature interval that excess conductivity exists. The excess conductivity delta sigma(T) has been revealed to obey an exponential temperature dependence in the broad temperature range T-f < T < T*. The description of the excess conductivity can be interpreted in terms of the mean-field theory where T* is the mean-field transition temperature to the pseudogap state and delta*(T) is satisfactory described within the framework of the BCS-BEC crossover theory. The value of the transverse coherence length xi(c)(0) increases by a factor of 1.4 and the point of 2D-3D crossover shifts with respect to temperature.

引用

页码：234 / 240

页数：7

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