Evidence of the influence of magnetism on pseudogap states in the high   resolution spectra of EuFe$_2$As$_2$
  Employing {\it state of the art} high resolution photoemission spectroscopy, we studied the temperature evolution of the electronic structure of EuFe$_2$As$_2$, an unique pnictide, where antiferromagnetism of Eu layer survives within the superconducting phase due to `FeAs' layers achieved via substitution and/or pressure. High energy and angle resolution helped to reveal pseudogap-quasiparticle features having primarily As 4$p$ character and spin density wave transition induced band folding in the electronic structure. A weakly dispersing feature of dominant As 4$p$ character is discovered around 80 meV that becomes weaker in intensity below 20 K manifesting influence of antiferromagnetic order on conduction electrons. These results provide an evidence of a link between the pseudogap states and magnetism that could be revealed employing high resolutions. 
Ganesh Adhikary, Nishaina Sahadev, Deep Narayan Biswas, R. Bindu,   Neeraj Kumar, A. Thamizhavel, S. K. Dhar and Kalobaran Maiti
cond-mat.supr-con