This title appears in the Scientific Report :
2003
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevB.67.014522 in citations.
Please use the identifier: http://hdl.handle.net/2128/1963 in citations.
Current-injection in a ballistic multiterminal superconductor/two-dimensional electron gas Josephson junction
Current-injection in a ballistic multiterminal superconductor/two-dimensional electron gas Josephson junction
We study the suppression of the critical current in a multi-terminal superconductor/two-dimensional electron gas/superconductor Josephson junction by means of hot carrier injection. As a superconductor Nb is used, while the two-dimensional electron gas is located in a strained InGaAs/InP heterostruc...
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Personal Name(s): | Schäpers, T. |
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Guzenko, V. A. / Müller, S. J. / Golubov, A. A. / Brinkman, A. / Crecelius, G. / Kaluza, A. / Lüth, H. | |
Contributing Institute: |
Institut für Halbleiterschichten und Bauelemente; ISG-1 |
Published in: | Physical Review B Physical review / B, 67 67 (2003 2003) 1 1, S. 014522 014522 |
Imprint: |
College Park, Md.
APS
2003
|
Physical Description: |
014522-1 - 014522-10 |
DOI: |
10.1103/PhysRevB.67.014522 |
Document Type: |
Journal Article |
Research Program: |
Materialien, Prozesse und Bauelemente für die Mikro- und Nanoelektronik |
Series Title: |
Physical Review B
67 |
Subject (ZB): | |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/1963 in citations.
We study the suppression of the critical current in a multi-terminal superconductor/two-dimensional electron gas/superconductor Josephson junction by means of hot carrier injection. As a superconductor Nb is used, while the two-dimensional electron gas is located in a strained InGaAs/InP heterostructure. Two different modes of injection are employed. First, in the three-terminal injection mode, where the injection current flows from an injector contact to one of the superconducting electrodes, only a partial suppression is obtained. Second, in the four-terminal mode, where the injection current flows between two opposite injector contacts, a complete suppression is achieved. A theoretical model for the critical current suppression in a short junction is presented, which takes the two-dimensional character of the junction into account. Qualitatively, the experimental data agree well with the theoretical predictions. The injection voltage required in the experiment to suppress the supercurrent is lower than theoretically predicted. This is explained by the fact that the width of the normal region of the junction is slightly too large to be in the short-junction limit. |