Nematic correlation length iron-based superconductors probed by inelastic x-ray scattering
Merritt, A. M.; Weber, F.
; Castellan, J.-P.; Wolf, T.; Ishikawa, D.; Said, A. H.; Alatas, A.; Fernandes, R. M.; Baron, A. Q. R.; Reznik, D.
; Castellan, J.-P.; Wolf, T.; Ishikawa, D.; Said, A. H.; Alatas, A.; Fernandes, R. M.; Baron, A. Q. R.; Reznik, D.Abstract:
Nematicity is ubiquitous in electronic phases of high-Tc superconductors, particularly in the Fe-based systems. We used inelastic x-ray scattering to extract the temperature-dependent nematic correlation length ξ from the anomalous softening of acoustic phonon modes in FeSe, underdoped Ba(Fe0.97Co0.03)2As2 and optimally doped Ba(Fe0.94Co0.06)2As2. In all cases, we find that ξ is well described by a power law (T−T0)−1/2 extending over a wide temperature range. We attributed this mean-field behavior and the extended fluctuation regime to a sizable nemato-elastic coupling, which may be detrimental to superconductivity.
| Zugehörige Institution(en) am KIT | Institut für Festkörperphysik (IFP) |
| Publikationstyp | Forschungsbericht/Preprint |
| Publikationsjahr | 2020 |
| Sprache | Englisch |
| Identifikator | KITopen-ID: 1000104844 |
| Verlag | Karlsruher Institut für Technologie (KIT) |
| Vorab online veröffentlicht am | 06.01.2020 |
| Nachgewiesen in | arXiv |
| Relationen in KITopen |