2010/07/31 by J. Levallois, Julien Levallois, F. Lévy-Bertrand +7 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Materials science #Nuclear Materials and Properties #Physics #Rare-earth and actinide compounds #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.84.184420
published as Phys. Rev. B 84, 184420 (2011) · To be published in Physical Review B
arxiv created 2011/10/28 · openalex publication_date 2011/11/15 · arxiv updated 2011/11/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We performed far-infrared optical spectroscopy measurements on the heavy fermion compound URu2Si2 as a function of temperature. The light's electric field was applied along the a or c axis of the tetragonal structure. We show that in addition to a pronounced anisotropy, the optical conductivity exhibits for both axis a partial suppression of spectral weight around 12 meV and below 30 K. We attribute these observations to a change in the band structure below 30 K. However, since these changes have no noticeable impact on the entropy nor on the DC transport properties, we suggest that this is a crossover phenomenon rather than a thermodynamic phase transition.