Effect of high pressure on the fluctuation conductivity and the charge transfer of YBa2Cu3O7-δ single crystals

被引：63

作者：

Vovk, R. V. ^{[2
]}

Obolenskii, M. A. ^{[2
]}

Zavgorodniy, A. A. ^{[2
]}

Bondarenko, A. X. ^{[2
]}

Goulatis, I. L. ^{[2
]}

Samoilov, A. X. ^{[2
]}

Chroneos, A. ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, England

[2] Kharkov Natl Univ, UA-61077 Kharkov, Ukraine

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 453卷 / 1-2期

关键词：

high pressure; YBa2Cu3O7-delta single crystals; fluctuation conductivity; charge transfer; coherence length;

D O I：

10.1016/j.jallcom.2006.11.169

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The influence of hydrostatic pressure of up to 11 kbar on the fluctuation conductivity in the ab plane of the YBa2Cu3O7-delta, (YBCO) single crystals with various oxygen concentrations is studied. In contrast to samples of stoichiometric composition, the application of high pressure on samples with oxygen deficiency, leads to the decrease of the coherence length perpendicular to the ab plane xi(c)(0). The pressure-induced redistribution of the labile oxygen causes a shift of the temperature interval in which three-dimensional superconducting fluctuations exist and a diffusion redistribution of the labile components from the phase of lower critical temperature to the high-temperature superconducting phase. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：69 / 74

页数：6

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