Stabilization of U 5f2 configuration in UTe2 through U 6d dimers in the 
presence of Te2 chains

Christovam, Denise S.; Sundermann, Martin; Marino, Andrea; Takegami, Daisuke; Falke, Johannes; Dolmantas, Paulius; Harder, Manuel; Gretarsson, Hlynur; Keimer, Bernhard; Gloskovskii, Andrei; Haverkort, Maurits W.; Elfimov, Ilya; Zwicknagl, Gertrud; Andreev, Alexander V.; Havela, Ladislav; Bordelon, Mitchell M.; Bauer, Eric D.; Rosa, Priscila F. S.; Severing, Andrea; Tjeng, Liu Hao

doi:10.1103/PhysRevResearch.6.033299

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Stabilization of U 5f² configuration in UTe₂ through U 6d dimers in the presence of Te2 chains

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Christovam, Denise S.
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons204679

Sundermann, Martin
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons252729

Marino, Andrea
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons212985

Takegami, Daisuke
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons257328

Falke, Johannes
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons291618

Dolmantas, Paulius
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons197306

Zwicknagl, Gertrud
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons204677

Severing, Andrea
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126881

Tjeng, Liu Hao
Liu Hao Tjeng, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Christovam, D. S., Sundermann, M., Marino, A., Takegami, D., Falke, J., Dolmantas, P., et al. (2024). Stabilization of U 5f² configuration in UTe₂ through U 6d dimers in the presence of Te2 chains. Physical Review Research, 6(3): 033299, pp. 1-8. doi:10.1103/PhysRevResearch.6.033299.

Cite as: https://hdl.handle.net/21.11116/0000-0010-37AC-F

Abstract

We investigate the topological superconductor candidate UTe2 using high-resolution valence-band resonant inelastic x-ray scattering at the U M4,5 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-Te2 distances exclude Te2 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 5f2 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 5f2 ansatz. © 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Open access publication funded by Max Planck Society.