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000601919 1001_ $$0P:(DE-H253)PIP1096035$$aChristovam, Denise S.$$b0$$eCorresponding author
000601919 245__ $$aSpectroscopic Evidence of Kondo-Induced Quasiquartet in CeRh$_2$As$_2$
000601919 260__ $$aCollege Park, Md.$$bAPS$$c2024
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000601919 520__ $$aCeRh$_2$As$_2$ is a new multiphase superconductor with strong suggestions for an additional itinerant multipolar ordered phase. The modeling of the low-temperature properties of this heavy-fermion compound requires a quartet Ce$^{3+}$ crystal-field ground state. Here, we provide the evidence for the formation of such a quartet state using x-ray spectroscopy. Core-level photoelectron and x-ray absorption spectroscopy confirm the presence of Kondo hybridization in CeRh$_2$As$_2$. The temperature dependence of the linear dichroism unambiguously reveals the impact of Kondo physics for coupling the Kramer’s doublets into an effective quasiquartet. Nonresonant inelastic x-ray scattering data find that the $|Γ^−_7⟩$ state with its lobes along the 110 direction of the tetragonal structure (xy orientation) contributes most to the multiorbital ground state of CeRh$_2$As$_2$.
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000601919 536__ $$0G:(GEPRIS)387555779$$aDFG project 387555779 - Von versteckter bis antiferromagnetischer Ordnung mit großem Moment in URu2Si2: eine Röntgenstrahluntersuchung der 5f Besetzung und Wellenfunktionssymmetrie. (387555779)$$c387555779$$x2
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000601919 7001_ $$00000-0002-2899-5340$$aFerreira-Carvalho, Miguel$$b1
000601919 7001_ $$aMarino, Andrea$$b2
000601919 7001_ $$0P:(DE-H253)PIP1028536$$aSundermann, Martin$$b3
000601919 7001_ $$0P:(DE-H253)PIP1083998$$aTakegami, Daisuke$$b4
000601919 7001_ $$00000-0001-6966-0857$$aMelendez-Sans, Anna$$b5
000601919 7001_ $$aTsuei, Ku Ding$$b6
000601919 7001_ $$0P:(DE-H253)PIP1017642$$aHu, Zhiwei$$b7
000601919 7001_ $$0P:(DE-H253)PIP1097947$$aRößler, Sahana$$b8
000601919 7001_ $$00000-0003-4895-8114$$aValvidares, Manuel$$b9
000601919 7001_ $$0P:(DE-H253)PIP1099608$$aHaverkort, Maurits W.$$b10
000601919 7001_ $$0P:(DE-H253)PIP1085733$$aLiu, Yu$$b11
000601919 7001_ $$00000-0003-0017-1937$$aBauer, Eric D.$$b12
000601919 7001_ $$0P:(DE-H253)PIP1029973$$aTjeng, Liu Hao$$b13
000601919 7001_ $$00000-0003-1634-5428$$aZwicknagl, Gertrud$$b14
000601919 7001_ $$0P:(DE-H253)PIP1027074$$aSevering, Andrea$$b15$$eCorresponding author
000601919 77318 $$2Crossref$$3journal-article$$a10.1103/physrevlett.132.046401$$bAmerican Physical Society (APS)$$d2024-01-22$$n4$$p046401$$tPhysical Review Letters$$v132$$x0031-9007$$y2024
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