Phonons as a probe of the magnetic state in doped and undoped BaFe2As2

Details Phonons as a probe of the magnetic state in doped and undoped BaFe2As2 Phonons as a probe of the magnetic state in doped and undoped BaFe2As2

2009-08-29

arxiv.org/abs/0908.4359v3

Phys. Rev. B 80, 214534 (2009)

Physics

Condensed Matter

Superconductivity

Minor revision of the text

Scientific paper

We measured phonon frequencies and linewidths in doped and undoped BaFe2As2 single crystals by inelastic x-ray scattering and compared our results with density functional theory (DFT) calculations. In agreement with previous work, the calculated frequencies of some phonons depended on whether the ground state was magnetic or not and, in the former case, whether phonon wavevector was parallel or perpendicular to the magnetic ordering wavevector. The experimental results agreed better with the magnetic calculation than with zero Fe moment calculations, except the peak splitting expected due to magnetic domain twinning was not observed. Furthermore, phonon frequencies were unaffected by the breakdown of the magnetic ground state due to either doping or increased temperature. Based on these results we propose that phonons strongly couple not to the static order, but to high frequency magnetic fluctuations.

Affiliated with

Also associated with

No associations

Rating

Phonons as a probe of the magnetic state in doped and undoped BaFe2As2 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Phonons as a probe of the magnetic state in doped and undoped BaFe2As2, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phonons as a probe of the magnetic state in doped and undoped BaFe2As2 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-621278