(A=K,Rb,Cs)

We report milliKelvin heat and charge transport measurements in high-quality single crystals of the heavily hole-doped AFe₂As₂ (A=K,Rb,Cs) superconductors as a function of magnetic field applied both perpendicular and parallel to the basal plane. The temperature dependence of both electrical and thermal resistivities exhibit non-Fermi-liquid behavior that is dependent on magnetic field. We compare results for all A species to each other, as well as previous results in which the non-Fermi-liquid temperature dependence of the resistivity was taken to indicate a field-tuned quantum critical point at the superconducting upper critical field.