Figure 1
From: Theory for electric dipole superconductivity with an application for bilayer excitons
A side view of the exciton in bilayer system and the induced supercurrent by magnetic field gradient.
(a) The top and bottom layers host holes and electrons respectively and the middle blue block stands for the interlayer barrier which prevents tunneling between the two layers. (b) The left (right) panel shows the induced super electric dipole current for magnetic field gradient ∂Bz/∂z < 0 (∂Bz/∂z > 0). The arrows on the blue lines denote the direction of positive charge flow in each layer.
