6533b82afe1ef96bd128b7cd
RESEARCH PRODUCT
Intercalation effect on hyperfine parameters of Fe in FeSe superconductor with Tc = 42 K
Sergey A. MedvedevVadim KsenofontovSimon J. CassidySimon J. ClarkeSergii I. ShylinSergii I. ShylinClaudia FelserGerhard WortmannStefan J. Sedlmaiersubject
SuperconductivitySuperconductivity (cond-mat.supr-con)Materials scienceCondensed Matter - SuperconductivityIntercalation (chemistry)Analytical chemistryGeneral Physics and AstronomyFOS: Physical sciencesQuadrupole splittingAtmospheric temperature rangeHyperfine structureSpectral lineIondescription
57Fe-Mossbauer spectra of superconducting beta-FeSe, the Li/NH3 intercalate product and a subsequent sample of this intercalate treated with moist He gas have been measured in temperature range 4.7 - 290 K. A correlation is established between hyperfine parameters and critical temperature Tc in these phases. A strong increase of isomer shift upon intercalation is explained by a charge transfer from the Li/NH3 intercalate to the FeSe layers resulting in an increase of Tc up to 42 K. A significant decrease of the quadrupole splitting above 240 K has been attributed to diffusive motion of Li+ ions within the interlamellar space.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-11-13 |