Intrinsic Josephson junction characteristics of Nd2-xCexCuO4 /SrTiO3 epitaxial films

IF 2.1 4区物理与天体物理 Q3 PHYSICS, CONDENSED MATTER

Solid State Communications Pub Date : 2024-10-11 DOI:10.1016/j.ssc.2024.115723

引用次数: 0

Abstract

The current-voltage (I-V) properties along the c axis on Nd_2-xCe_xCuO₄/SrTiO₃ epitaxial films with x = 0.145, 0.15 were investigated. For all the samples it has been established that the I-V characteristics exhibit several resistive branches, which correspond to the resistive states of individual Josephson junctions. The results confirm the idea of a tunneling mechanism between the CuO₂ layers (superconductor - insulator - superconductor junction) for the investigated Nd_2-xCe_xCuO₄ compound. The I-V dependence of this compound with x = 0.15 points out on the nonmonotonic nature of the d-wave or anisotropic s-wave symmetry order parameter associated with the coexistence of superconductivity and antiferromagnetic fluctuations.

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Nd2-xCexCuO4 /SrTiO3 外延薄膜的本征约瑟夫森结特性

研究了 x = 0.145、0.15 的 Nd2-xCexCuO4/SrTiO3 外延薄膜沿 c 轴的电流-电压（I-V）特性。所有样品的 I-V 特性都显示出多个电阻分支，这些分支与单个约瑟夫森结的电阻状态相对应。这些结果证实了所研究的 Nd2-xCexCuO4 复合物在 CuO2 层之间存在隧道机制（超导体-绝缘体-超导体结）。x = 0.15 时该化合物的 I-V 依赖性表明，与超导性和反铁磁波动共存相关的 d 波或各向异性 s 波对称有序参数具有非单调性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Solid State Communications 物理-物理：凝聚态物理

CiteScore

3.40

自引率

4.80%

发文量

287

审稿时长

51 days

期刊介绍： Solid State Communications is an international medium for the publication of short communications and original research articles on significant developments in condensed matter science, giving scientists immediate access to important, recently completed work. The journal publishes original experimental and theoretical research on the physical and chemical properties of solids and other condensed systems and also on their preparation. The submission of manuscripts reporting research on the basic physics of materials science and devices, as well as of state-of-the-art microstructures and nanostructures, is encouraged. A coherent quantitative treatment emphasizing new physics is expected rather than a simple accumulation of experimental data. Consistent with these aims, the short communications should be kept concise and short, usually not longer than six printed pages. The number of figures and tables should also be kept to a minimum. Solid State Communications now also welcomes original research articles without length restrictions. The Fast-Track section of Solid State Communications is the venue for very rapid publication of short communications on significant developments in condensed matter science. The goal is to offer the broad condensed matter community quick and immediate access to publish recently completed papers in research areas that are rapidly evolving and in which there are developments with great potential impact.