Incommensurate magnetic excitations in superconducting LiFeAs

N. Qureshi; P. Steffens; Y. Drees; A. C. Komarek; D. Lamago; Y. Sidis; L. Harnagea; H. -J. Grafe; S. Wurmehl; 5 B. Büchner; M. Braden

doi:10.1103/PhysRevLett.108.117001

Incommensurate magnetic excitations in superconducting LiFeAs

Superconductivity 2015-05-30 v1

Authors: N. Qureshi , P. Steffens , Y. Drees , A. C. Komarek , D. Lamago , Y. Sidis , L. Harnagea , H. -J. Grafe , S. Wurmehl , 5 B. Büchner , M. Braden

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

Magnetic correlations in superconducting LiFeAs were studied by elastic and by inelastic neutron scattering experiments. There is no indication for static magnetic ordering but inelastic correlations appear at the incommensurate wave vector (0:5+-d 0:-+d 0) with d=0.07 slightly shifted from the commensurate ordering observed in other FeAs-based compounds. The incommensurate magnetic excitations respond to the opening of the superconducting gap by a transfer of spectral weight.

Keywords

incommensurate magnetic excitations superconducting LiFeAs neutron scattering spectral weight FeAs-based compounds

Cite

@article{arxiv.1108.6187,
  title  = {Incommensurate magnetic excitations in superconducting LiFeAs},
  author = {N. Qureshi and P. Steffens and Y. Drees and A. C. Komarek and D. Lamago and Y. Sidis and L. Harnagea and H. -J. Grafe and S. Wurmehl and 5 B. Büchner and M. Braden},
  journal= {arXiv preprint arXiv:1108.6187},
  year   = {2015}
}

Comments

4 pages 5 figures

Incommensurate magnetic excitations in superconducting LiFeAs

Abstract

Keywords

Cite

Comments

Related papers