Carrier transport in multi-terminal superconductor/two-dimensional electron gas Josephson junctions

The critical current in a superconductor/two-dimensional electron gas junct ion/superconductor junction is controlled by an injection current. In case of a carrier injection from one contact to the semiconductor through the tw o-dimensional electron gas region of the junction to an ohmic contact at th e opposite side a complete suppression of the supercurrent is obtained. The experimental results are compared to a theoretical model based in the solu tion of the Gor'kov equations, which takes the finite width of the sample i nto account. O 2001 Elsevier Science B.V. All rights reserved.