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| Home > Publications database > Stabilization of U 5f$^2$ configuration in UTe$_2$ through U 6d dimers in the presence of Te$_2$ chains |
| Journal Article | PUBDB-2024-05992 |
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2024
APS
College Park, MD
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Please use a persistent id in citations: doi:10.1103/PhysRevResearch.6.033299 doi:10.3204/PUBDB-2024-05992
Abstract: We investigate the topological superconductor candidate UTe$_2$ using high-resolution valence-band resonant inelastic x-ray scattering at the U 𝑀$_{4,5}$ edges. We observe atomiclike low-energy excitations that support the correlated nature of this unconventional superconductor. These excitations originate from the U 5𝑓2 configuration, which is unexpected since the short Te2-Te$_2$ distances exclude Te$_2$ being 2−. By utilizing the photoionization cross-section dependence of the photoemission spectra in combination with band structure calculations, we infer that the stabilization of the U 5𝑓$_2$ configuration is due to the U 6𝑑 bonding states in the U dimers acting as a charge reservoir. Our results emphasize that the description of the physical properties should commence with a 5𝑓$_2$ ansatz.
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