Temperature Dependent Local Structure of LaFeAsO_{1-x}F_x: Probing the Bond Correlations

Simple item page
dc.creatorTyson, T. A.
dc.creatorWu, T.
dc.creatorWoicik, J.
dc.creatorRavel, B.
dc.creatorIgnatov, A.
dc.creatorZhang, C. L.
dc.creatorQin, Z.
dc.creatorZhou, T.
dc.creatorCheong, S. -W.
dc.date2009-03-24
dc.date.accessioned2026-07-07T12:56:01Z
dc.date.available2026-07-07T12:56:01Z
dc.descriptionThe local structure of the parent and doped LaFeAsO1-xFx (pnictide) compounds were studied by x-ray absorption spectroscopy. In the doped system, the Fe-As and Fe-Fe correlations are well modeled by an Einstein model with no low temperature anomalies. For the Fe-As bonds, the Einstein temperatures are identical for the doped (11%) and undoped samples, but the doped sample is found to have a lower level of static disorder. For the Fe-Fe correlation, doping enhances the effective Einstein temperature of Fe-Fe atom correlation. The results suggest that the onset of superconductivity in the F doped system may be related to enhanced magnetic correlations. Density functional calculations of the charge density reveal strong bonding between neighboring As ions but metal-like behavior in the Fe layers.
dc.identifierhttps://arxiv.org/abs/0903.3992
dc.identifierhttp://arxiv.org/abs/0903.3992
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/224446
dc.subjectSuperconductivity
dc.subjectOther Condensed Matter
dc.titleTemperature Dependent Local Structure of LaFeAsO_{1-x}F_x: Probing the Bond Correlations
dc.typetext

Files

Collections

arXiv