Unconventional slow spin fluctuations in Ba122 iron-based superconductors

DOI

The iron-based superconductors are at the forefront of the research on unconventional superconductivity. The Barium-122 systems, doped with electrons, reveal a non-trivial behavior, above the superconducting transition (Tc), in nuclear magnetic resonance (NMR) relaxation times. 75As NMR spin-spin relaxation time in the normal phase of 122 iron-based superconductors shows very slow spin fluctuations, which are absent in the high temperature superconducting cuprates. Recent experiments show the presence of nematic charge fluctuations, in the same observed temperature/doping range. We thereby propose a muon spin rotation experiment to characterize the spin fluctuations, in a zero field and transverse field environment, in order to extend our previous NMR study, carried out in a broad range of magnetic fields, as well as to investigate the in-plane anisotropy of such slow dynamics.

Identifier
DOI https://doi.org/10.5286/ISIS.E.63007534
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/63007534
Provenance
Creator Dr Mark Telling; Professor Pietro Carretta; Dr Matteo Moroni; Dr Lucia Bossoni
Publisher ISIS Neutron and Muon Source
Publication Year 2018
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 Natural Sciences; Physics
Temporal Coverage Begin 2015-07-20T08:30:00Z
Temporal Coverage End 2015-07-20T23:00:00Z