Robust superconductivity and transport properties in (Li1-xFex)OHFeSe single crystals

Abstract

The recently discovered (Li${}_{1-x}$Fe${}_x$)OHFeSe superconductor with $T_c$ about 40K provides a good platform for investigating the magnetization and electrical transport properties of FeSe-based superconductors. By using a hydrothermal ion-exchange method, we have successfully grown crystals of (Li${}_{1-x}$Fe${}_x$)OHFeSe. X-ray diffraction on the sample shows the single crystalline PbO-type structure with the c-axis preferential orientation. Magnetic susceptibility and resistive measurements show an onset superconducting transition at around $T_c$=38.3K. Using the magnetization hysteresis loops and Bean critical state model, a large critical current $J_s$ is observed in low temperature region. The critical current density is suppressed exponentially with increasing magnetic field. Temperature dependencies of resistivity under various currents and fields are measured, revealing a robust superconducting current density and bulk superconductivity.

5 pages, 5 figures

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• Metastable superconducting state in quenched KxFe2-ySe2

Cited by in corpus (9)

• Protonation induced high-Tc phases in iron-based superconductors evidenced by NMR and magnetization measurements
• High-Tc superconductivity up to 55 K under high pressure in the heavily electron doped Lix(NH3)yFe2Se2 single crystal
• Significant enhancement of critical current density in H+-intercalated FeSe single crystal
• Superconductivity at 44.4 K achieved by intercalating EMIM+ into FeSe
• Band structure reconstruction across nematic order in high quality FeSe single crystal as revealed by optical spectroscopy study
• Superconductivity in LiOHFeS single crystals with a shrunk c-axis lattice constant
• Superconductivity in LaPd2Bi2 with CaBe2Ge2-type structure
• Transport properties of Lix(NH3)yFe2(TezSe1-z)2 single crystals in the mixed state
• Long range magnetic order in hydroxide layer doped (Li${}_{1-x-y}$Fe${}_x$Mn${}_y$OD)FeSe