Weakening of the spin density wave gap at low temperatures in SrFe2As2 single crystals

  title={Weakening of the spin density wave gap at low temperatures in SrFe2As2 single crystals},
  author={Anirban Dutta and Neeraj Kumar and Arumugam Thamizhavel and Anjan Kumar Gupta},
  journal={Physica Status Solidi B-basic Solid State Physics},
We report on temperature dependent scanning tunneling microscopy and spectroscopy studies of undoped SrFeAs single crystals from 6 to 292 K. Resistivity data show spin density wave (SDW) transition at 205 K and the superconducting transition at 21 K while magnetic susceptibility does not show any superconductivity. Tunnel spectra correlate well with the SDW transition with a depression in the density of states near the Fermi energy below . On further lowering the temperature, the width of this… Expand
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