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Large spin-orbit coupling, kagome lattice, nontrivial topological bandstructure with inverted bands anti-crossings, and Weyl nodes are essentialingredients, ideally required to obtain maximal anomalous Hall effect (AHE) aresimultaneously present in Co$_3$Sn$_2$S$_2$. It is a leading platform to showlarge intrinsic anomalous Hall conductivity (AHC) and giant anomalous Hallangle (AHA) simultaneously at low fields. The giant AHE in Co$_3$Sn$_2$S$_2$ isrobust against small-scale doping-related chemical potential changes. In thiswork, we unveil a selective and co-chemical doping route to maximize AHEs inCo$_3$Sn$_2$S$_2$. To begin with, in Co$_3$Sn$_{2-x}$In$_x$S$_2$, we broughtthe chemical potential at the hotspot of Berry curvature along with a maximumof asymmetric impurity scattering in high mobility region. As a result atx=0.05, we found a significant enhancement of AHA (95%) and AHC (190%) from thesynergistic enhancement of extrinsic and intrinsic mechanisms from modifiedBerry curvature of gaped nodal lines. Later, with anticipation of furtherimprovements in AHE, we grew hole-co-dopedCo$_{3-y}$Fe$_y$Sn$_{2-x}$In$_x$S$_2$ crystals, where we found rather asuppression of AHEs. The role of dopants in giving extrinsic effects or bandbroadening can be better understood when chemical potential does not changeafter doping. By simultaneous and equal co-doping with electrons and holes inCo$_{3-y-z}$Fe$_y$Ni$_z$Sn$_2$S$_2$, we kept the chemical potential unchanged.Henceforth, we found a significant enhancement in intrinsic AHC $\sim$116% dueto the disorder broadenings in kagome bands

How to enhance anomalous Hall effects in magnetic Weyl semimetal Co$_3$Sn$_2$S$_2$?