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- W3000682700 abstract "To understand the superconductivity recently discovered in Nd$_{0.8}$Sr$_{0.2}$NiO$_2$, we carried out LDA+DMFT (local density approximation plus dynamical mean-field theory) and magnetic force response calculations. The on-site correlation in Ni-$3d$ orbitals causes notable changes in the electronic structure. The calculated temperature-dependent susceptibility exhibits the Curie-Weiss behavior, indicating the localized character of its moment. From the low-frequency behavior of self-energy, we conclude that the undoped phase of this nickelate is Fermi-liquid-like contrary to cuprates. Interestingly, the estimated correlation strength by means of the inverse of quasi-particle weight is found to increase and then decrease as a function of hole concentration, forming a dome-like shape. Another remarkable new finding is that magnetic interactions in this material become two-dimensional by hole doping. While the undoped NdNiO$_2$ has the sizable out-of-plane interaction, hole dopings strongly suppress it. This two-dimensionality is maximized at the hole concentration $deltaapprox0.25$. Further analysis as well as the implications of our new findings are presented." @default.
- W3000682700 created "2020-01-23" @default.
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- W3000682700 date "2020-01-13" @default.
- W3000682700 modified "2023-09-27" @default.
- W3000682700 title "Induced magnetic two-dimensionality by hole doping in superconducting infinite-layer nickelate." @default.
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- W3000682700 hasPublicationYear "2020" @default.
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