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RESEARCH PRODUCT
Superconductivity and magnetism in Rb0.8Fe1.6Se2under pressure
Gerhard WortmannAlois LoidlVladimir TsurkanVladimir TsurkanVadim KsenofontovSergey A. MedvedevLeslie M. SchoopClaudia FelserTaras PalasyukJoachim Deisenhofersubject
SuperconductivityMaterials scienceCondensed matter physicsMagnetismCondensed Matter PhysicsSynchrotronPhysics::GeophysicsElectronic Optical and Magnetic Materialslaw.inventionCondensed Matter::Materials ScienceParamagnetismMagnetizationlawCondensed Matter::SuperconductivityPhase (matter)AntiferromagnetismCondensed Matter::Strongly Correlated ElectronsSuperstructure (condensed matter)description
High-pressure magnetization, structural and 57Fe M\"ossbauer studies were performed on superconducting Rb0.8Fe1.6Se2.0 with Tc = 32.4 K. The superconducting transition temperature gradually decreases on increasing pressure up to 5.0 GPa followed by a marked step-like suppression of superconductivity near 6 GPa. No structural phase transition in the Fe vacancy-ordered superstructure is observed in synchrotron XRD studies up to 15.6 GPa, while the M\"ossbauer spectra above 5 GPa reveal the appearance of a new paramagnetic phase and significant changes in the magnetic and electronic properties of the dominant antiferromagnetic phase, coinciding with the disappearance of superconductivity. These findings underline the strong correlation between antiferromagnetic order and superconductivity in phase-separated AxFe2-x/2Se2 (A = K, Rb, Cs) superconductors.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-06-19 | Physical Review B |