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Spurious magnetism in high-Tc superconductor

P. K. Mang·S. Larochelle·M. Greven
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Abstract

One challenge in condensed-matter physics is to unravel the interplay between magnetism and superconductivity in copper oxides with a high critical temperature (Tc). Kang et al. claim to have revealed a quantum phase transition from the superconducting to an antiferromagnetic state in the electron-doped material Nd2-xCexCuO4 (NCCO) based on the observation of magnetic-field-induced neutron scattering intensity at (1/2,1/2,0), (1/2,0,0), and related reflections. Here we argue that the observed magnetic intensity is due to a secondary phase of (Nd,Ce)2O3. We therefore contend that the effect is spurious and not intrinsic to superconducting NCCO.

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P. K. Mang, S. Larochelle, M. Greven. 2003-11-16. Spurious magnetism in high-Tc superconductor. https://arxiv.org/abs/cond-mat/0308607

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