Observation of Superconductivity in Li-intercalated SnSe₂ Single Crystals

We have successfully synthesized layered SnSe₂ single crystals through the vapor transportation method. Lithium was further intercalated into SnSe₂ using the electrochemical gating method. The Li_xSnSe₂ single crystals were characterized through magnetization and resistivity measurements down to 1.9 K, which reveal diamagnetism and resistivity drop below T_c ~ 6 K. These characteristics can be attributed to the onset of superconductivity. The physical properties of both unintercalated (x = 0) and intercalated (x ≠ 0) Li_xSnSe₂ will be reported.