Anomalous optical phonons in FeTe pnictides: spin state, magnetic order, and lattice anharmonicity

Details Anomalous optical phonons in FeTe pnictides: spin state, magnetic order, and lattice anharmonicity Anomalous optical phonons in FeTe pnictides: spin state, magnetic order, and lattice anharmonicity

2011-02-17

arxiv.org/abs/1102.3688v1

Phys. Rev. B 83, 245127 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

17 pages, 3 figures

Scientific paper

Polarized Raman-scattering spectra of non-superconducting, single-crystalline FeTe are investigated as function of temperature. We have found a relation between the magnitude of ordered magnetic moments and the linewidth of A1g phonons at low temperatures. This relation is attributed to the intermediate spin state (S=1) and the orbital degeneracy of the Fe ions. Spin-phonon coupling constants have been estimated based on microscopic modeling using density-functional theory and analysis of the local spin density. Our observations show the importance of orbital degrees of freedom for the Fe-based superconductors with large ordered magnetic moments, while small magnetic moment of Fe ions in some iron pnictides reflects the low spin state of Fe ions in those systems.

Affiliated with

Also associated with

No associations

Rating

Anomalous optical phonons in FeTe pnictides: spin state, magnetic order, and lattice anharmonicity 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 Anomalous optical phonons in FeTe pnictides: spin state, magnetic order, and lattice anharmonicity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anomalous optical phonons in FeTe pnictides: spin state, magnetic order, and lattice anharmonicity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-210846