Charge dynamics of the spin-density-wave state in BaFe$_2$As$_2$

F. Pfuner; J. G. Analytis; J. -H. Chu; I. R. Fisher; L. Degiorgi

doi:10.1140/epjb/e2009-00062-2

Charge dynamics of the spin-density-wave state in BaFe$_2$As$_2$

Strongly Correlated Electrons 2012-01-10 v1

Authors: F. Pfuner , J. G. Analytis , J. -H. Chu , I. R. Fisher , L. Degiorgi

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Abstract

We report on a thorough optical investigation of BaFe $_2$ As $_2$ over a broad spectral range and as a function of temperature, focusing our attention on its spin-density-wave (SDW) phase transition at $T_{SDW}=135$ K. While BaFe $_2$ As $_2$ remains metallic at all temperatures, we observe a depletion in the far infrared energy interval of the optical conductivity below $T_{SDW}$ , ascribed to the formation of a pseudogap-like feature in the excitation spectrum. This is accompanied by the narrowing of the Drude term consistent with the $dc$ transport results and suggestive of suppression of scattering channels in the SDW state. About 20% of the spectral weight in the far infrared energy interval is affected by the SDW phase transition.

Keywords

charge density wave optical conductivity high-temperature superconductivity

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@article{arxiv.0811.2195,
  title  = {Charge dynamics of the spin-density-wave state in BaFe$_2$As$_2$},
  author = {F. Pfuner and J. G. Analytis and J. -H. Chu and I. R. Fisher and L. Degiorgi},
  journal= {arXiv preprint arXiv:0811.2195},
  year   = {2012}
}

Charge dynamics of the spin-density-wave state in BaFe$_2$As$_2$

Abstract

Keywords

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