Paramagnon in a KxFe2-ySe2 superconductor

DOI

A recent time-of-flight experiment on a superconducting KxFe2-ySe2 sample revealed not only spin resonance mode at 14 meV around the (0.5,0.25,0) wave vector, but also a ring-like low energy (LE) mode at 9 meV which connects the equivalent resonance positions in the HK0 scattering plane. This feature does not show a temperature dependence upon entering the superconducting state. We suspect that this new excitation is a paramagnon resulting from the nesting of the electron pockets at M point. In order to confirm its magnetic character we propose to study its temperature dependence in the normal state and its dispersion with the out-of-plane wave vector.

Identifier
DOI https://doi.org/10.5291/ILL-DATA.4-01-1206
Metadata Access https://data.ill.fr/openaire/oai?verb=GetRecord&metadataPrefix=oai_datacite&identifier=10.5291/ILL-DATA.4-01-1206
Provenance
Creator Ivanov, Alexandre; Piovano, Andrea; Keimer, Bernhard; Inosov, Dmytro; Friemel, Gerd; Jang, Hoyoung; Park, Jitae; Guerrero, Juan Pablo Porras Perez; Nassar, Roy
Publisher Institut Laue-Langevin
Publication Year 2013
Rights OpenAccess; info:eu-repo/semantics/openAccess
OpenAccess true
Representation
Resource Type Dataset
Size 15 MB
Version 1
Discipline Particles, Nuclei and Fields