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Sun","submitted_at":"2016-02-25T16:33:45Z","abstract_excerpt":"Transition-metal dichalcogenides (TMDs) $MX_2$ ($M$ = Ti, Nb, Ta; $X$ = S, Se, Te) exhibit a rich set of charge density wave (CDW) orders, which usually coexist and/or compete with superconductivity. The mechanisms of CDWs and superconductivity in TMDs are still under debate. Here we perform an investigation on a typical TMD system, 1\\emph{T}-TaSe$_{2-x}$Te$_x$ ($0 \\leq x \\leq 2$). Doping-induced disordered distribution of Se/Te suppresses CDWs in 1\\emph{T}-TaSe$_2$. A domelike superconducting phase with the maximum $T_\\textrm{c}^{\\textrm{onset}}$ of 2.5 K was observed near CDWs. 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