Electron-phonon coupling and momentum-dependent electron dynamics in EuFe2As2 using time- and angle-resolved photoemission spectroscopy

L. Rettig; R. Cortés; S. Thirupathaiah; P. Gegenwart; H. S. Jeevan; T. Wolf; U. Bovensiepen; M. Wolf; H. A. Dürr; J. Fink

Electron-phonon coupling and momentum-dependent electron dynamics in EuFe2As2 using time- and angle-resolved photoemission spectroscopy

Superconductivity 2010-12-07 v2

Authors: L. Rettig , R. Cortés , S. Thirupathaiah , P. Gegenwart , H. S. Jeevan , T. Wolf , U. Bovensiepen , M. Wolf , H. A. Dürr , J. Fink

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Abstract

The Fe pnictide parent compound EuFe2As2 exhibits a strongly momentum dependent carrier dynamics around the hole pocket at the center of the Brillouin zone. The very different dynamics of electrons and holes cannot be explained solely by intraband scattering and interband contributions have to be considered. In addition, three coherently excited modes at frequencies of 5.6, 3.1 and 2.4 THz are observed. An estimate of the electron-phonon coupling parameter reveals lambda < 0.5, suggesting a limited importance of e-ph coupling to superconductivity in Fe pnictides.

Keywords

electron-phonon coupling phonon modes and lattice dynamics phonon physics

Cite

@article{arxiv.1008.1561,
  title  = {Electron-phonon coupling and momentum-dependent electron dynamics in EuFe2As2 using time- and angle-resolved photoemission spectroscopy},
  author = {L. Rettig and R. Cortés and S. Thirupathaiah and P. Gegenwart and H. S. Jeevan and T. Wolf and U. Bovensiepen and M. Wolf and H. A. Dürr and J. Fink},
  journal= {arXiv preprint arXiv:1008.1561},
  year   = {2010}
}

Comments

4 pages, 4 figures, supp. online material

Electron-phonon coupling and momentum-dependent electron dynamics in EuFe2As2 using time- and angle-resolved photoemission spectroscopy

Abstract

Keywords

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