The degree of 5f electron localization in URu2Si2: electron energy-loss spectroscopy and spin-orbit sum rule analysis

Abstract

We examine the degree of 5f electron localization in URu2Si2 using spin-orbit sum rule analysis of the U N4,5 (4d \to 5f) edge. When compared to α-U metal, US, USe, and UTe, which have increasing localization of the 5f states, we find that the 5f states of URu2Si2 are more localized, although not entirely. Spin-orbit analysis shows that intermediate coupling is the correct angular momentum coupling mechanism for URu2Si2 when the 5f electron count is between 2.6 and 2.8. These results have direct ramifications for theoretical assessment of the hidden order state of URu2Si2, where the degree of localization of the 5f electrons and their contribution to the Fermi surface are critical.

5 pages, 2 figures

References in corpus (8)

• Nature of the 5f states in actinide metals
• Gapped itinerant spin excitations account for missing entropy in the hidden order state of URu${}_2$Si${}_2$
• Sum-rules for electron energy-loss near-edge spectra
• Interplay between SDW and induced local moments in URu2Si2
• Evolution of critical scaling behavior near a ferromagnetic quantum phase transition
• Competing Ordered Phases in URu2Si2: Hydrostatic Pressure and Re-substitution
• X-ray absorption branching ratio in actinides: LDA+DMFT approach
• Hydrostaticity and hidden order: effects of experimental conditions on the temperature-pressure phase diagram of URu2Si2

Cited by in corpus (17)

• 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)
• Hidden order and beyond: an experimental-theoretical overview of the multifaceted behavior of URu${}_2$Si${}_2$
• Antiferromagnetic critical pressure in URu2Si2 under hydrostatic conditions
• Spectroscopic determination of the atomic f-electron symmetry underlying hidden order in URu${}_2$Si${}_2$
• Direct bulk sensitive probe of 5f symmetry in URu2Si2
• Probing 5f-state configurations in URu2Si2 with U L3-edge resonant x-ray emission spectroscopy
• 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
• Hidden and Hastatic Orders in URu2Si2
• Origin of gap-like behaviors in URu${}_2$Si${}_2$: Combined study via quasiparticle scattering spectroscopy and resistivity measurements
• Comparative analysis for meaningful interpretation of rare-earth oxide M${}_{4,5}$ energy loss edges
• Heat capacity of URu${}_{2-x}$Os${}_x$Si${}_2$ at low temperatures
• f-electron charge densities probed using core level non-resonant inelastic x-ray scattering
• Unified Theory of Hastatic order and Antiferromagnetism in URu${}_2$Si${}_2$