Hybridization gap and anisotropic far-infrared optical conductivity of URu2Si2

  title={Hybridization gap and anisotropic far-infrared optical conductivity of URu2Si2},
  author={Julien Levallois and F. L'evy-Bertrand and Micha{\"e}l K Tran and D.Stricker and John A. Mydosh and Y.-K. Huang and D. van der Marel},
  journal={Physical Review B},
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… 

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