Momentum dependent ultrafast electron dynamics in antiferromagnetic EuFe2As2

L. Rettig; R. Cortes; S. Thirupathaiah; P. Gegenwart; H. S. Jeevan; M. Wolf; J. Fink; U. Bovensiepen

doi:10.1103/PhysRevLett.108.097002

Momentum dependent ultrafast electron dynamics in antiferromagnetic EuFe2As2

Superconductivity 2013-03-26 v2 Strongly Correlated Electrons

Authors: L. Rettig , R. Cortes , S. Thirupathaiah , P. Gegenwart , H. S. Jeevan , M. Wolf , J. Fink , U. Bovensiepen

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

Employing the momentum-sensitivity of time- and angle-resolved photoemission spectroscopy we demonstrate the analysis of ultrafast single- and many-particle dynamics in antiferromagnetic EuFe2As2. Their separation is based on a temperature-dependent difference of photo-excited hole and electron relaxation times probing the single particle band and the spin density wave gap, respectively. Reformation of the magnetic order occurs at 800 fs, which is four times slower compared to electron-phonon equilibration due to a smaller spin-dependent relaxation phase space.

Keywords

ultrafast electron dynamics antiferromagnetic EuFe2As2 time- and angle-resolved photoemission spectroscopy spin density wave electron-phonon equilibration momentum sensitivity relaxation times

Cite

@article{arxiv.1110.3938,
  title  = {Momentum dependent ultrafast electron dynamics in antiferromagnetic EuFe2As2},
  author = {L. Rettig and R. Cortes and S. Thirupathaiah and P. Gegenwart and H. S. Jeevan and M. Wolf and J. Fink and U. Bovensiepen},
  journal= {arXiv preprint arXiv:1110.3938},
  year   = {2013}
}

Momentum dependent ultrafast electron dynamics in antiferromagnetic EuFe2As2

Abstract

Keywords

Cite

Related papers