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Our study investigated the feasibility of optimizing elastic modulus and transport performance of superconductors through engineering strategy, which was realized in the graphene incorporated Fe(Se, Te) hybrid materials via spark plasma sintering process. By analyzing the results of microscopic characterization and transport measurement, the correlation between material synthesis technique and superconducting properties was set up. Specifically, the incorporation of graphene could obviously decrease the elastic modulus of Fe(Se, Te), while the utilization of spark plasma sintering evidently en...

Binary Iron selenide (FeSe) thin films have been widely studied for years to unveil the high temperature superconductivity in iron-based superconductors. However, the origin of superconduct-ing transition in this unconventional system is still under debate and worth deep investigations. In the present work, the transition from insulator to superconductor was achieved in non-superconducting FeSe ultrathin films (~8 nm) grown on calcium fluoride substrates via a simple in-situ Mg-coating by a pulsed laser deposition technique. The Mg-coated FeSe film with an optimized amount of Mg exhibited a su...