TY  - JOUR
AU  - Christovam, Denise S.
AU  - Sundermann, Martin
AU  - Marino, Andrea
AU  - Takegami, Daisuke
AU  - Falke, Johannes
AU  - Dolmantas, Paulius
AU  - Harder, Manuel
AU  - Gretarsson, Hlynur
AU  - Keimer, Bernhard
AU  - Gloskovskii, Andrei
AU  - Haverkort, Maurits W.
AU  - Elfimov, Ilya
AU  - Zwicknagl, Gertrud
AU  - Andreev, Alexander V.
AU  - Havela, Ladislav
AU  - Bordelon, Mitchell M.
AU  - Bauer, Eric D.
AU  - Rosa, Priscila F. S.
AU  - Severing, Andrea
AU  - Tjeng, Liu Hao
TI  - Stabilization of U 5f<sup>2</sup> configuration in UTe<sub>2</sub> through U 6d dimers in the presence of Te<sub>2</sub> chains
JO  - Physical review research
VL  - 6
IS  - 3
SN  - 2643-1564
CY  - College Park, MD
PB  - APS
M1  - PUBDB-2024-05992
SP  - 033299
PY  - 2024
AB  - We investigate the topological superconductor candidate UTe<sub>2</sub> using high-resolution valence-band resonant inelastic x-ray scattering at the U 𝑀<sub>4,5</sub> edges. We observe atomiclike low-energy excitations that support the correlated nature of this unconventional superconductor. These excitations originate from the U 5⁢𝑓2 configuration, which is unexpected since the short Te2-Te<sub>2</sub> distances exclude Te<sub>2</sub> 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 5⁢𝑓<sub>2</sub> configuration is due to the U 6⁢𝑑 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 5⁢𝑓<sub>2</sub> ansatz.  
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001381679000002
DO  - DOI:10.1103/PhysRevResearch.6.033299
UR  - https://bib-pubdb1.desy.de/record/614773
ER  -