Transverse resistance of YBa2Cu3O7-δ single crystals

被引：4

作者：

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

Khadzhai, G. Ya. ^{[1
]}

Dobrovolskiy, O. V. ^{[1
,2
]}

Nazyrov, Z. F. ^{[1
]}

Chroneos, A. ^{[3
]}

机构：

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

[2] Goethe Univ, Inst Phys, D-60438 Frankfurt, Germany

[3] Coventry Univ, Fac Engn & Comp, Coventry CV1 5FB, W Midlands, England

来源：

CURRENT APPLIED PHYSICS | 2015年 / 15卷 / 05期

关键词：

Superconducting cuprates; Transverse resistance; Anisotropy; Electrical resistance measurements; FLUCTUATION CONDUCTIVITY; ELECTRICAL-RESISTIVITY; INSULATOR-TRANSITION; HIGH-PRESSURE; SUPERCONDUCTIVITY; RELAXATION; PSEUDOGAP; PARACONDUCTIVITY; PRASEODYMIUM; TEMPERATURE;

D O I：

10.1016/j.cap.2015.02.016

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Measured is the transverse electrical resistance of YBa2Cu3O7-delta single crystals with different oxygen deficiency values (delta) in the temperature range T-c -300 K. The experimental data are approximated by an empiric expression accounting for the fluctuation conductivity near T-c and the semiconductor-like resistance regime. Our analysis of the concentration dependences of the fitting parameters, in particular, reveals that the resistance temperature dependence is largely affected by the sample's non-homogeneity. The latter, in turn, causes a T-c anisotropy and variable-range hopping conductivity between different phases. The deduced maximal values of the basal-plane coherence length, xi(xy)(0), are comparable with those for low-temperature superconductors. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：617 / 621

页数：5

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