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Vortex dynamics in<i>β</i>-FeSe single crystals: effects of proton irradiation and small inhomogeneous stress
We report on the critical current density Jc and the vortex dynamics of pristine and 3 MeV proton irradiated (cumulative dose equal to 2x10^16 cm^-2) $\beta$-FeSe single crystals. We also analyze a remarkable dependence of the superconducting critical temperature Tc, Jc and the flux creep rate S on the sample …