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arXiv · 2410.00488

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

T. B. Charikova·D. I. Devyaterikov·V. N. Neverov·M. R. Popov·N. G. Shelushinina·A. A. Ivanov
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Abstract

The current-voltage (I-V) properties along the c axis on Nd2-xCexCuO4 /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 Nd2-xCexCuO4 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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T. B. Charikova, D. I. Devyaterikov, V. N. Neverov, M. R. Popov, N. G. Shelushinina, A. A. Ivanov. 2024-10-01. Intrinsic Josephson junction characteristics of Nd2-xCexCuO4/SrTiO3 epitaxial films. https://arxiv.org/abs/2410.00488

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