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Coexistence of superconductivity and ferromagnetism, though a very fewsystems show this, is one of the exciting properties of a solid from thefundamental science point of view. Here, we report on the discovery ofsuperconductivity in the van der Waals ferromagnetic Cr$_3$Te$_4$ that iscoexisted with ferromagnetism, induced by the Sn intercalation(Sn$_{0.06}$Cr$_{3}$Te$_4$), below a transition temperature of $T_c$=3.5 K. Inaddition, despite the magnetism and Meissner effects are anisotropic, thesuperconductivity observed from the in-plane electrical resistivity($\rho_{\it{bc}}$) is nearly isotropic between $H\parallel \it{bc}$ and$H\parallel \it{a}$, suggesting separate channels of conduction electronsresponsible for the superconductivity and ferromagnetism of this system whichis supported by our spin-resolved DFT calculations. We identify two ordersincrease in the carrier density of Cr$_{3}$Te$_4$ by Sn intercalation comparedto the parent Cr$_3$Te$_4$. We think, the enhanced carrier density could beplaying a key role for the discovered superconductivity in ferromagneticSn$_{0.06}$Cr$_{3}$Te$_4$. We also explored other mechanisms such as the Fermisurface nesting to understand microscopically the superconductivity of thissystem.

Discovery of Superconductivity in Van der Waals Ferromagnetic Sn$_{0.06}$Cr$_3$Te$_4$