Spin excitations in LiFeAs, a stoichiometric ferropnictide superconductor at ambient pressure

DOI

We propose to measure the powder-averaged spin excitation spectrum of LiFeAs, a new member of the ferropnictide family of superconductors. This compound is special because it is stoichiometric and therefore not chemically doped, and yet it is a superconductor below Tc ~ 18K. Our aim is to establish to what extent the spin dynamics in this material resembles the non-superconducting parent phases and to what extent it resembles the extrinsically doped superconductors. There are two objectives. First we will measure the bandwidth of the spin excitation spectrum and compare the results with a model developed for the stoichiometric non-superconducting parent phases like BaFe2As2. Second we will search for the existence of a resonance-like excitation below Tc, as observed in superconducting (Ba1-xKx)Fe2As2.

Identifier
DOI https://doi.org/10.5286/ISIS.E.24067220
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/24067220
Provenance
Creator Dr Toby Perring; Dr Russell Ewings; Professor Andrew Boothroyd
Publisher ISIS Neutron and Muon Source
Publication Year 2014
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Photon- and Neutron Geosciences
Temporal Coverage Begin 2009-03-19T10:00:30Z
Temporal Coverage End 2011-04-06T07:35:50Z