(color online) (a) RT characteristic of the bulk Cd₃As₂. Upper Inset: Schematics of the standard four-probe method measurement configuration. Lower inset: Zoom-in of the RT curve below 10 K. (b) Temperature dependence of the zero-bias PC resistance. Inset: Schematics of the PCS measurement configuration. (c) Normalized spectra at different temperatures. (d) Zoom-in of the normalized ZBCP.^[132] The unit .