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${}_2$

Abstract

We present the effect of yttrium substitution on superconductivity in the La${}_{1-\text{x}}$Y${}_{\text{x}}$O${}_{0.5}$F${}_{0.5}$BiS${}_2$ system. Polycrystalline samples with nominal Y concentrations up to 40% were synthesized and characterized via electrical resistivity, magnetic susceptibility, and specific heat measurements. Y substitution reduces the lattice parameter \textit{a} and unit cell volume \textit{V}, and a correlation between the lattice parameter \textit{c}, the La-O-La bond angle, and the superconducting critical temperature $T_c$ is observed. The chemical pressure induced by Y substitution for La produces neither the high-$T_c$ superconducting phase nor the structural phase transition seen in LaO${}_{0.5}$F${}_{0.5}$BiS${}_2$ under externally applied pressure.

References in corpus (9)

• Superconductivity Appears in the Vicinity of an Insulating-Like Behavior in CeO${}_{1-x}$F${}_x$BiS${}_2$
• Minimal electronic models for superconducting BiS${}_2$ layers
• Superconductivity of F-substituted LnOBiS2 (Ln = La, Ce, Pr, Nd, Yb) compounds
• Ferroelectric Soft Phonons, Charge Density Wave Instability and Strong Electron-Phonon Coupling in BiS2-Layered Superconductors
• Superconductivity induced by La doping in Sr1-xLaxFBiS2 system
• Pressure Study of BiS2-Based Superconductors Bi4O4S3 and La(O,F)BiS2
• Evolution of superconductivity in LaO1-xFxBiS2 prepared by high pressure technique
• Effect of the chemical pressure on superconductivity and SDW in undoped and 15%F doped La1-yYyFeAsO compounds
• Optical spectroscopy study of Nd(O,F)BiS2 single crystals

Cited by in corpus (2)

• Evolution of superconductivity in BiS2-based superocnductor LaO0.5F0.5Bi(S1-xSex)2
• High pressure effects on non-fluorinated BiS2-based superconductors La${}_{1-x}$M${}_x$OBiS${}_2$ (M = Ti and Th)