Phase diagrams and physical properties of Ba(Fe$_{1-x}$TM$_x$)$_2$As$_2$ (TM = Co, Ni, Cu, Rh, Pd)

A brief overview and summary of the effects of transition metal (Co, Ni, Cu, Pd, and Rh) doping on physical properties of BaFe$_2$As$_2$ will be presented. A comparison of the phase diagrams for different dopants will be examined in detail. A range of experimental parameters that allow for the stabilization of superconductivity will be outlined. The evolution of physical properties with doping, in particular, a possible Lifshitz transition at low doping as inferred from thermoelectric power and Hall measurements (as well as ARPES) will be examined. In addition, a ``universal'' behavior of specific heat jump at $T_c$ will be discussed.