Stabilization of U 5$f^2$ configuration in UTe$_2$ through U 6d dimers in the presence of Te2 chains
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2024
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| author | Christovam, Denise S. Sundermann, Martin Marino, Andrea Takegami, Daisuke Falke, Johannes Dolmantas, Paulius Harder, Manuel Keimer, Hlynur Gretarsson amd 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 |
| author_facet | Christovam, Denise S. Sundermann, Martin Marino, Andrea Takegami, Daisuke Falke, Johannes Dolmantas, Paulius Harder, Manuel Keimer, Hlynur Gretarsson amd 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 |
| contents | 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 atomic-like low-energy excitations that support the correlated nature of this unconventional superconductor. These excitations originate from the U $5f^2$ 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 $5f^2$ 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 $5f^2$ $ansatz$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_03852 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Stabilization of U 5$f^2$ configuration in UTe$_2$ 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 Keimer, Hlynur Gretarsson amd 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 Strongly Correlated Electrons 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 atomic-like low-energy excitations that support the correlated nature of this unconventional superconductor. These excitations originate from the U $5f^2$ 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 $5f^2$ 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 $5f^2$ $ansatz$. |
| title | Stabilization of U 5$f^2$ configuration in UTe$_2$ through U 6d dimers in the presence of Te2 chains |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2402.03852 |