Raman Active High Energy Excitations in URu${}_2$Si${}_2$

Abstract

We have performed Raman scattering measurements on URu${}_2$Si${}_2$ single crystals on a large energy range up to $\sim$ 1300 cm${}^{-1}$ and in all the Raman active symmetries as a function of temperature down to 15 K. A large excitation, active only in the E${}_g$ symmetry, is reported. It has been assigned to a crystal electric field excitation on the Uranium site. We discuss how this constrains the crystal electric field scheme of the Uranium ions. Furthermore, three excitations in the A${}_{1g}$ symmetry are observed. They have been associated to double Raman phonon processes consistently with ab initio calculations of the phonons dispersion.

References in corpus (10)

• Inelastic Light Scattering From Correlated Electrons
• Emergent Rank-5 'Nematic' Order in URu2Si2
• Chirality density wave of the 'hidden order' phase in URu${}_2$Si${}_2$
• The modulated spin liquid: a new paradigm for URu${}_2$Si${}_2$
• Hidden and antiferromagnetic order as a rank-5 superspin in URu2Si2
• Probing 5f-state configurations in URu2Si2 with U L3-edge resonant x-ray emission spectroscopy
• Symmetry of the Excitations in the Hidden Order State of URu2Si2
• Hastatic Order in URu2Si2 : Hybridization with a Twist
• Lattice dynamics of the heavy fermion compound URu${}_2$Si${}_2$
• Multipole order and global/site symmetry in the hidden order phase of URu2Si2

Cited by in corpus (1)

• Hidden order and beyond: an experimental-theoretical overview of the multifaceted behavior of URu${}_2$Si${}_2$