Evolution of superconductivity in LaO1-xFxBiS2 prepared by high pressure technique

Abstract

Novel BiS2-based superconductors LaO1-xFxBiS2 prepared by the high pressure synthesis technique were systematically studied. It was found that the high pressure annealing strongly the lattice as compared to the LaO1-xFxBiS2 samples prepared by conventional solid state reaction at ambient pressure. Bulk superconductivity was observed within a wide F-concentration range of x = 0.2 ~ 0.7. On the basis of those results, we have established a phase diagram of LaO1-xFxBiS2.

11 pages, 6 figures

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• In-plane Charge Fluctuations in Bismuth Sulfide Superconductors
• Stabilization of high-Tc phase of BiS2-based superconductor LaO0.5F0.5BiS2 using high-pressure synthesis
• Evolution of superconductivity in BiS2-based superocnductor LaO0.5F0.5Bi(S1-xSex)2
• Enhancement of thermoelectric properties by Se substitution in layered bismuth-chalcogenide LaOBiS2-xSex
• Appearance of bulk Superconductivity under Hydrostatic Pressure in Sr0.5RE0.5FBiS2 (RE = Ce, Nd, Pr and Sm) compounds
• Raman scattering investigation of the electron-phonon coupling in superconducting Nd(O,F)BiS${}_2$
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• Effect of hydrostatic pressures on the superconductivity of new BiS2 based REO0.5F0.5BiS2 (RE-La, Pr and Nd) superconductors
• High-Tc Phase of PrO0.5F0.5BiS2 single crystal induced by uniaxial pressure
• Effect of high pressure annealing on the normal state transport of LaO0.5F0.5BiS2
• Effect of yttrium substitution on the superconducting properties of the system La${}_{1-\text{x}}$Y${}_{\text{x}}$O${}_{0.5}$F${}_{0.5}$BiS${}_2$
• Enhancement of Superconductivity in La${}_{1-x}$Sm${}_x$O${}_{0.5}$F${}_{0.5}$BiS${}_2$
• Evidence for spin-triplet odd-parity superconductivity close to type-II van Hove singularities
• Anisotropic upper critical field of BiS2-based superconductor LaO0.5F0.5BiS2
• Pressure-induced phase transition for single crystalline LaO0.5F0.5BiSe2
• Superconducting properties of novel BiSe${}_2$-based layered LaO${}_{1-x}$F${}_x$BiSe${}_2$ single crystals
• Increase in Tc and change of crystal structure by high-pressure annealing in BiS2-based superconductor CeO0.3F0.7BiS2
• Significant enhancement of superconductivity under hydrostatic pressure in CeO0.5F0.5BiS2 superconductor
• Element Substitution Effect on Superconductivity in BiS2-Based NdO_{1-x}F_xBiS_2