Spectroscopic determination of the atomic f-electron symmetry underlying hidden order in URu${}_2$Si${}_2$

Abstract

The low temperature hidden order state of URu${}_2$Si${}_2$ has long been a subject of intense speculation, and is thought to represent an as yet undetermined many-body quantum state not realized by other known materials. Here, X-ray absorption spectroscopy (XAS) and high resolution resonant inelastic X-ray scattering (RIXS) are used to observe electronic excitation spectra of URu${}_2$Si${}_2$, as a means to identify the degrees of freedom available to constitute the hidden order wavefunction. Excitations are shown to have symmetries that derive from a correlated $5f^2$ atomic multiplet basis that is modified by itinerancy. The features, amplitude and temperature dependence of linear dichroism are in agreement with ground states that closely resemble the doublet ${\Gamma }_5$ crystal field state of uranium.

References in corpus (8)

• Imaging the Fano Lattice to 'Hidden Order' Transition in URu2Si2
• Rotational Symmetry Breaking in the Hidden-Order Phase of URu2Si2
• Emergent Rank-5 'Nematic' Order in URu2Si2
• Hastatic Order in URu2Si2
• Momentum-resolved evolution of the Kondo lattice into 'hidden-order' in URu2Si2
• The degree of 5f electron localization in URu2Si2: electron energy-loss spectroscopy and spin-orbit sum rule analysis
• Multiplet resonance lifetimes in resonant inelastic X-ray scattering involving shallow core levels
• Hidden and Hastatic Orders in URu2Si2

Cited by in corpus (18)

• Low energy band structure and symmetries of UTe2 from angle resolved photoemission spectroscopy
• 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
• EDRIXS: An open source toolkit for simulating spectra of resonant inelastic x-ray scattering
• Direct bulk sensitive probe of 5f symmetry in URu2Si2
• Synchrotron Radiation Techniques and their Application to Actinide Materials
• Probing 5f-state configurations in URu2Si2 with U L3-edge resonant x-ray emission spectroscopy
• High temperature singlet-based magnetism from Hund's rule correlations
• Identifying f-electron symmetries of UTe2 with O-edge resonant inelastic X-ray scattering
• Singlet magnetism in intermetallic UGa${}_2$ unveiled by inelastic x-ray scattering
• Isoelectronic perturbations to $f$-$d$-electron hybridization and the enhancement of hidden order in URu${}_2$Si${}_2$
• 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${}_2$
• Charge transfer excitations in VUV and soft X-ray resonant scattering spectroscopies
• Quantifying the U $5f$ covalence and degree of localization in U intermetallics
• From hidden-order to antiferromagnetism: electronic structure changes in Fe-doped URu${}_2$Si${}_2$
• High-resolution valence band RIXS at the actinide M${}_{4,5}$-edges
• f-electron charge densities probed using core level non-resonant inelastic x-ray scattering