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| 001 | 601919 | ||
| 005 | 20250715170719.0 | ||
| 024 | 7 | _ | |a 10.1103/PhysRevLett.132.046401 |2 doi |
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| 100 | 1 | _ | |a Christovam, Denise S. |0 P:(DE-H253)PIP1096035 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Spectroscopic Evidence of Kondo-Induced Quasiquartet in CeRh$_2$As$_2$ |
| 260 | _ | _ | |a College Park, Md. |c 2024 |b APS |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a CeRh$_2$As$_2$ is a new multiphase superconductor with strong suggestions for an additional itinerant multipolar ordered phase. The modeling of the low-temperature properties of this heavy-fermion compound requires a quartet Ce$^{3+}$ crystal-field ground state. Here, we provide the evidence for the formation of such a quartet state using x-ray spectroscopy. Core-level photoelectron and x-ray absorption spectroscopy confirm the presence of Kondo hybridization in CeRh$_2$As$_2$. The temperature dependence of the linear dichroism unambiguously reveals the impact of Kondo physics for coupling the Kramer’s doublets into an effective quasiquartet. Nonresonant inelastic x-ray scattering data find that the $|Γ^−_7⟩$ state with its lobes along the 110 direction of the tetragonal structure (xy orientation) contributes most to the multiorbital ground state of CeRh$_2$As$_2$. |
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| 700 | 1 | _ | |a Ferreira-Carvalho, Miguel |0 0000-0002-2899-5340 |b 1 |
| 700 | 1 | _ | |a Marino, Andrea |b 2 |
| 700 | 1 | _ | |a Sundermann, Martin |0 P:(DE-H253)PIP1028536 |b 3 |
| 700 | 1 | _ | |a Takegami, Daisuke |0 P:(DE-H253)PIP1083998 |b 4 |
| 700 | 1 | _ | |a Melendez-Sans, Anna |0 0000-0001-6966-0857 |b 5 |
| 700 | 1 | _ | |a Tsuei, Ku Ding |b 6 |
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| 700 | 1 | _ | |a Liu, Yu |0 P:(DE-H253)PIP1085733 |b 11 |
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| 700 | 1 | _ | |a Zwicknagl, Gertrud |0 0000-0003-1634-5428 |b 14 |
| 700 | 1 | _ | |a Severing, Andrea |0 P:(DE-H253)PIP1027074 |b 15 |e Corresponding author |
| 773 | 1 | 8 | |a 10.1103/physrevlett.132.046401 |b American Physical Society (APS) |d 2024-01-22 |n 4 |p 046401 |3 journal-article |2 Crossref |t Physical Review Letters |v 132 |y 2024 |x 0031-9007 |
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