Pairing type change upon an increase in the cerium doping level in the Nd2-x Ce x CuO4+δ electronic superconductor

被引：1

作者：

Charikova, T. B. ^{[1
]}

Kharus, G. I. ^{[1
]}

Shelushinina, N. G. ^{[1
]}

Petukhova, O. E. ^{[1
]}

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

机构：

[1] Russian Acad Sci, Ural Branch, Inst Met Phys, Ekaterinburg 620990, Russia

[2] Natl Res Nucl Univ MEPhI, Moscow 115410, Russia

来源：

JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS | 2012年 / 114卷 / 03期

基金：

俄罗斯基础研究基金会;

关键词：

UPPER CRITICAL-FIELD; THIN-FILMS;

D O I：

10.1134/S1063776112020173

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the results of analyzing the temperature dependences of the resistivity of the Nd2 - x Ce (x) CuO4 + delta electronic superconductor with x = 0.14 (underdoped range), x = 0.15 (optimal doping), and x = 0.18 (overdoped range) and with various degrees of annealing in an oxygen-free atmosphere in magnetic fields up to H = 90 kOe (H parallel to c, J parallel to ab) in the temperature range T = (0.4-300) K. It is shown that the observed differences in the dependences of the slope of the upper critical field (dH(c2)/dT|(Tc) on the degree of disorder in the Nd2 - x Ce (x) CuO4 + delta system upon a change in the cerium doping level indicate a change in the symmetry of d-type pairing to anisotropic s pairing.

引用

页码：496 / 502

页数：7

共 48 条

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