Study of vortex glass-liquid transition and superconducting properties of single-crystalline boron-doped FeSe0.5Te0.5

We report on the superconducting transport properties of B-doped FeSe0.5Te0.5 single crystals grown by the self-flux method. The structure and superconductivity of these samples were carefully analyzed using X-ray diffraction, scanning electron microscopy, and electrical transport measurements. The crystal structure owns the same tetragonal symmetry as PbO. The B-doped samples show a more significant electronic anisotropy in the superconducting state. Microstructural analysis shows that B-doping of FeSe0.5Te0.5 increases the Fe content in the single crystal samples. B-doping decreases Tc slightly, resulting in lower irreversibility lines. This work revealed the physical effects of B-doping in FeSe0.5Te0.5 superconductors and inspired a way to regulate the superconductivity through elemental manipulation.