Experimental Progress towards Probing the Ground State of an Electron-Hole Bilayer by Low-Temperature Transport

Figure 1

A schematic representation for independent ohmic contacts to a 2x2DEG. A similar method will work for a 2x2DHG as well. Notice that the 2DEG exists due to carriers from ionised dopants before the contacts are made. The sketch on the right hand side shows the rough profile of the bottom of the conduction band.