Phonons as a probe of the magnetic state in doped and undoped BaFe2As2 (2009)
Reznik, D., Lokshin, K., Mitchell, D. C., Parshall, D., Dmowski, W., Lamago, D., ...
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....
Spin-Phonon Coupling in Iron Pnictide Superconductors (2009)
Egami, T., Fine, B. V., Singh, D. J., Parshall, D., Dai, P.
The magnetic moment in the parent phase of the iron-pnictide superconductors varies with composition even when the nominal charge of iron is unchanged. We propose the spin-lattice coupling due to the...
Spin-Phonon Coupling and Superconductivity in Fe Pnictides (2009)
Egami, T., Parshall, D., Subedi, A., Singh, D. J.
We propose a theory of strong spin-lattice and spin-phonon coupling in iron pnictides and discuss its implications on superconductivity. Strong magneto-volume effect in iron compounds has long been...
Spin Excitations in BaFe1.84Co0.16As2 Superconductor Observed by Inelastic Neutron Scattering (2009)
Parshall, D., Lokshin, K. A., Niedziela, Jennifer, Christianson, A. D., Lumsden, M. D., Mook, H. A., ...
Superconductivity appears to compete against the spin-density-wave in Fe pnictides. However, optimally cobalt doped samples show a quasi-two-dimensional spin excitation centered at the (0.5, 0.5, L)...
Two-dimensional resonant magnetic excitation in BaFe1.84Co0.16As2 (2008)
Lumsden, M. D., Christianson, A. D., Parshall, D., Stone, M. B., Nagler, S. E., MacDougall, G. J., ...
Inelastic neutron scattering measurements on single crystals of superconducting BaFe1.84Co0.16As2 reveal a magnetic excitation located at wavevectors (1/2 1/2 L) in tetragonal notation. On cooling...
C-axis Phonons in Fe-As Based Superconductors Investigated by Inelastic X-ray Scattering (2008)
Reznik, D., Lokshin, K., Mitchell, D. C., Parshall, D., Dmowski, W., Lamago, D., ...
In Fe-As based superconductors magnetism and superconductivity show strong sensitivity to the lattice, suggesting a possibility of unconventional electron-phonon coupling. We investigated c-axis...