Interplay between Superconductivity and Magnetism in Rb0.8Fe1.6Se2 under Pressure

Abstract

High-pressure magnetization, structural and 57Fe Mössbauer 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 Mössbauer 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.

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Cited by in corpus (11)

• Structure, magnetic order and excitations in the 245 family of Fe-based superconductors
• Superconductivity at Tc = 44 K in LixFe2Se2(NH3)y
• Optical conductivity of iron-based superconductors
• Interplay of the electronic and lattice degrees of freedom in A_{1-x}Fe_{2-y}Se_{2} superconductors under pressure
• Evolution of superconductivity in isovalent Te-substituted KxFe2-ySe2 crystals
• Compressibility and pressure-induced disorder in superconducting phase-separated Cs0.72Fe1.57Se2
• High-pressure single-crystal neutron scattering study of magnetic and Fe vacancy orders in (Tl,Rb)2Fe4Se5 superconductor
• Tuning orbital-selective correlation effects in superconducting Rb${}_{0.75}$Fe${}_{1.6}$Se${}_{2-z}$S${}_z$
• Structure, superconductivity, and magnetism in Rb1-xFe1.6Se2-zSz
• Pressure-induced magnetic collapse and metallization of $\mathrm{TlF}{\mathrm{e}}_{1.6}\mathrm{S}{\mathrm{e}}_2$
• Connection between ambient-pressure and pressure-induced superconducting phases in alkaline iron selenide superconductors