Hybridization gap and anisotropic far-infrared optical conductivity of URu2Si2

J. Levallois; F. Lévy-Bertrand; M. K. Tran; D. Stricker; J. A. Mydosh; Y. -K. Huang; D. van der Marel

doi:10.1103/PhysRevB.84.184420

Hybridization gap and anisotropic far-infrared optical conductivity of URu2Si2

Strongly Correlated Electrons 2011-11-17 v3

Authors: J. Levallois , F. Lévy-Bertrand , M. K. Tran , D. Stricker , J. A. Mydosh , Y. -K. Huang , D. van der Marel

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Abstract

We performed far-infrared optical spectroscopy measurements on the heavy fermion compound URu 2 Si 2 as a function of temperature. The light's electric-field was applied along the a-axis or the 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 bandstructure 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.

Keywords

hybridization gap anisotropic optical conductivity far-infrared spectroscopy heavy fermion compound URu2Si2 spectral weight

Cite

@article{arxiv.1007.0538,
  title  = {Hybridization gap and anisotropic far-infrared optical conductivity of URu2Si2},
  author = {J. Levallois and F. Lévy-Bertrand and M. K. Tran and D. Stricker and J. A. Mydosh and Y. -K. Huang and D. van der Marel},
  journal= {arXiv preprint arXiv:1007.0538},
  year   = {2011}
}

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To be published in Physical Review B

Hybridization gap and anisotropic far-infrared optical conductivity of URu2Si2

Abstract

Keywords

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