层间Cu+离子重排诱导体系超导转变

Layered materials with intercalated ions exhibit a variety of intriguing physical and chemical properties. To obtain the exotic two-dimensional (2D) materials, doping alteration crystals by ionic guest species are widely used in science. However, ion-intercalated layered properties induced change interlayered structures rarely studied. Hence, we demonstrate emergence superconductivity new structure Cu0.65NbS2 nanosheets. The Cu occupancy changes from ordered tetrahedral sites bulk to mixed as thickness reduces, which turns normal-metal crystal into superconductor. Prominently, superconducting transition temperature shows strong dependence dome-like shape, is different NbS2 system. arrangement can be method for promoting investigation novel intrinsic phenomenon 2D realm.