Fig. 4: Differential conductance of the DAI Josephson junction.
From: Doubled Shapiro steps in a dynamic axion insulator Josephson junction
Differential conductance dV/dI on the I0−Iac plane. I0 is proportional to applied DC voltage V0 while Iac is proportional to applied static magnetic field B0. \({{\mathcal{J}}}_{\alpha }\) represents the first kind of Bessel function of order α.
