Article Dans Une Revue Communications Physics Année : 2025

Revealing electronic correlations in YNi2B2C using photoemission spectroscopy

Résumé

We present a combined density functional theory (DFT), one-step model of photoemission, and soft x-ray angle-resolved photoemission spectroscopy (SX-ARPES) study of the electronic structure of the quaternary borocarbide superconductor YNi2B2C. Our analysis reveals the presence of moderate electronic correlations beyond the semilocal DFT within the generalized gradient approximation. We show that DFT and the full potential Korringa-Kohn-Rostoker method combined with the dynamical mean field theory (DFT+DMFT) with average Coulomb interaction U = 3.0 eV and the exchange energy J = 0.9 eV applied to the Ni d-states are necessary for reproducing the experimentally observed SX-ARPES spectra.

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Dates et versions

hal-04995195 , version 1 (18-03-2025)
hal-04995195 , version 2 (18-06-2025)

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Aki Pulkkinen, Geoffroy Kremer, Vladimir Strocov, Frank Weber, Ján Minár, et al.. Revealing electronic correlations in YNi2B2C using photoemission spectroscopy. Communications Physics, 2025, 8, pp.256. ⟨10.1038/s42005-025-02180-4⟩. ⟨hal-04995195v2⟩
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