Ultrafast Structural Dynamics of the Fe-Pnictide Parent Compound BaFe2As2
L. Rettig, S. O. Mariager, A. Ferrer, S. Grübel, J. A. Johnson, J. Rittmann, T. Wolf, S. L. Johnson, G. Ingold, P. Beaud, U. Staub
DOI 10.1103/PhysRevLett.114.067402 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Using femtosecond time-resolved x-ray diffraction we investigate the structural dynamics of the coherently excited A1g phonon mode in the Fe-pnictide parent compound BaFe2As2. The fluence dependent intensity oscillations of two specific Bragg reflections with distinctly different sensitivity to the pnictogen height in the compound allow us to quantify the coherent modifications of the Fe-As tetrahedra, indicating a transient increase of the Fe magnetic moments. By a comparison with time-resolved photoemission data, we derive the electron-phonon deformation potential for this particular mode. The value of Δμ/Δz=−(1.0–1.5) eV/Å is comparable with theoretical predictions and demonstrates the importance of this degree of freedom for the electron-phonon coupling in the Fe pnictides.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| BaFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Quantum oscillations in the parent pnictide BaFe2As2: Itinerant electrons in the reconstructed state
similarity 0.95James G. Analytis et al.
Source status unknown — claims are unverified
Ru doping in iron-based pnictides: The “unfolded” dominant role of structural effects for superconductivity
similarity 0.94M. Reticcioli et al.
Source status unknown — claims are unverified
Microscopic Theory of Magnetic Detwinning in Iron-Based Superconductors with Large-Spin Rare Earths
similarity 0.93Jannis Maiwald et al.
Source status unknown — claims are unverified
Decoupling of the superconducting and magnetic/structural phase transitions in electron-doped BaFe2As2
similarity 0.93P. C. Canfield et al.
Source status unknown — claims are unverified
Impurity-induced electronic nematic state and C2-symmetric nanostructures in iron pnictide superconductors
similarity 0.93Yoshio Inoue et al.
Source status unknown — claims are unverified
Spin-3/2 nuclear magnetic resonance: Exact analytical solutions for aligned systems and implications for probing Fe-based superconductors
similarity 0.93Jaafar N. Ansari & Karen L. Sauer
Source status unknown — claims are unverified