| Autor: |
Liu, Shouzheng, Xu, Yishuai, Kotta, Erica C., Miao, Lin, Ran, Sheng, Paglione, Johnpierre, Butch, Nicholas P., Denlinger, Jonathan D., Chuang, Yi-De, Wray, L. Andrew |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
Phys. Rev. B 106, L241111 (2022) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.106.L241111 |
| Popis: |
The recent discovery of spin-triplet superconductivity emerging from a non-magnetic parent state in UTe$_2$ has stimulated great interest in the underlying mechanism of Cooper pairing. Experimental characterization of short-range electronic and magnetic correlations is vital to understanding these phenomena. Here we use resonant inelastic X-ray scattering (RIXS), X-ray absorption spectroscopy (XAS), and atomic multiplet-based modeling to shed light on the active debate between 5$f^2$6$d^1$-based models with singlet crystal field states versus 5$f^3$-based models that predict atomic Kramers doublets and much greater 5$f$ itinerancy. The XAS and RIXS data are found to agree strongly with predictions for an 5$f^2$6$d^1$-like valence electron configuration with weak intra-dimer magnetic correlations, and provide new context for interpreting recent investigations of the electronic structure and superconducting pairing mechanism. |
| Databáze: |
arXiv |
| Externí odkaz: |
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