This work presents the emergence of superconductivity in Re substituted topological Weyl semimetal MoTe$_{ 2}$. Re substitution for Mo sites lead to a sizable enhancement in the superconducting transition temperature (T$_{ c}$). A record high T$_{ c}$ at ambient pressure in a 1T$'$-MoTe$_{ 2}$ (room temperature structure) related sample is observed for the Mo$_{ 0.7}$Re$_{ 0.3}$Te$_{ 2}$ composition (T$_{ c}$ = 4.1 K, in comparison MoTe$_{ 2}$, shows a T$_{ c}$ of 0.1 K). The experimental and theoretical studies indicate that Re substitution is doping electrons and facilitates the emergence of superconductivity by enhancing the electron-phonon coupling and density of states at the Fermi level. Our findings, therefore, open a new way to further manipulate and enhance the superconducting state together with the topological states in 2D van der Waals materials.
Categories: cond-mat.supr-con