Raman active high energy excitations in URu2Si2

We have performed Raman scattering measurements on URu2Si2 single crystals on a large energy range up to ∼1300cm−1 and in all the Raman active symmetries as a function of temperature down to 15K. A large excitation, active only in the Eg symmetry, is reported. It has been assigned to a crystal elect...

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Bibliographic Details
Published inPhysica. B, Condensed matter Vol. 506; pp. 19 - 22
Main Authors Buhot, Jonathan, Gallais, Yann, Cazayous, Maximilien, Sacuto, Alain, Piekarz, Przemysław, Lapertot, Gérard, Aoki, Dai, Méasson, Marie-Aude
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.02.2017
Elsevier
Subjects
Condensed Matter
Crystal electric field (CEF)
Exotic electronic order
Heavy fermions
Hidden order
Materials Science
Physics
Raman spectroscopy
Strongly Correlated Electrons
Superconductivity
URu2Si2
Hidden order
Heavy fermions
Crystal electric field (CEF)
Raman spectroscopy
URu2Si2
Exotic electronic order
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Summary:We have performed Raman scattering measurements on URu2Si2 single crystals on a large energy range up to ∼1300cm−1 and in all the Raman active symmetries as a function of temperature down to 15K. A large excitation, active only in the Eg 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 A1g symmetry are observed. They have been associated to double Raman phonon processes consistently with ab initio calculations of the phonons dispersion.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2016.10.034