Probing 5f-state configurations in URu2Si2 with U L3-edge resonant x-ray emission spectroscopy

Abstract

Resonant x-ray emission spectroscopy (RXES) was employed at the U L3 absorption edge and the La1 emission line to explore the 5f occupancy, nf, and the degree of 5f orbital delocalization in the hidden order compound URu2Si2. By comparing to suitable reference materials such as UF4, UCd11, and alpha-U, we conclude that the 5f orbital in URu2Si2 is at least partially delocalized with nf = 2.87 +/- 0.08, and does not change with temperature down to 10 K within the estimated error. These results place further constraints on theoretical explanations of the hidden order, especially those requiring a localized f2 ground state.

11 pages,7 figures

References in corpus (12)

• Gapped itinerant spin excitations account for missing entropy in the hidden order state of URu${}_2$Si${}_2$
• Hastatic Order in URu2Si2
• Fermi surface instability at the hidden-order transition of URu2Si2
• Multiconfigurational nature of 5f orbitals in uranium and plutonium intermetallics
• Chirality density wave of the 'hidden order' phase in URu${}_2$Si${}_2$
• Hidden Order Behaviour in URu2Si2 (A Critical Review of the Status of Hidden Order in 2014)
• Direct observation of lattice symmetry breaking at the hidden-order transition in URu2Si2
• Long range order and two-fluid behavior in heavy electron materials
• Cyclotron Resonance in the Hidden-Order Phase of URu2Si2
• The degree of 5f electron localization in URu2Si2: electron energy-loss spectroscopy and spin-orbit sum rule analysis
• Spectroscopic determination of the atomic f-electron symmetry underlying hidden order in URu${}_2$Si${}_2$
• Hastatic Order in URu2Si2 : Hybridization with a Twist

Cited by in corpus (13)

• Hidden order and beyond: an experimental-theoretical overview of the multifaceted behavior of URu${}_2$Si${}_2$
• Resonant x-ray spectroscopy of uranium intermetallics at the U $M_{4,5}$ edges
• Direct bulk sensitive probe of 5f symmetry in URu2Si2
• Synchrotron Radiation Techniques and their Application to Actinide Materials
• Distinct magnetic spectra in the hidden order and antiferromagnetic phases in URu2-xFexSi2
• Thermodynamic Measurement of Angular Anisotropy at the Hidden Order Transition of URu${}_2$Si${}_2$
• Quantifying the U $5f$ covalence and degree of localization in U intermetallics
• Origin of gap-like behaviors in URu${}_2$Si${}_2$: Combined study via quasiparticle scattering spectroscopy and resistivity measurements
• Raman Active High Energy Excitations in URu${}_2$Si${}_2$
• Valence instability across magnetostructural transition in USb${}_2$
• f-electron charge densities probed using core level non-resonant inelastic x-ray scattering
• UCd${}_{11}$: A strongly localized 5$f^3$ material
• Unified Theory of Hastatic order and Antiferromagnetism in URu${}_2$Si${}_2$