Current-injection in a ballistic multiterminal superconductor/two-dimensional electron gas Josephson junction
Th. Schäpers, V. A. Guzenko, R. P. Müller, A. A. Golubov, A. Brinkman, G. Crecelius, A. Kaluza, H. Lüth
DOI 10.1103/PhysRevB.67.014522 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8 | Pressure not reported | unknown |
Similar papers
Electrodynamics of Josephson junctions containing strong ferromagnets
similarity 0.95D. Massarotti et al.
Source status unknown — claims are unverified
Shot-noise and conductance measurements of transparent superconductor/two-dimensional electron gas junctions
similarity 0.95B.-R. Choi et al.
Source status unknown — claims are unverified
Vertical Nb/TiOx/Nb Josephson Junctions Controlled by In-Plane Hot-Electron Injection
similarity 0.95Zuyu Xu et al.
Source status unknown — claims are unverified
Direct dynamical coupling of spin modes and singlet Josephson supercurrent in ferromagnetic Josephson junctions
similarity 0.94I. Petković et al.
Source status unknown — claims are unverified
Local suppression of Josephson currents in niobium/two-dimensional electron gas/niobium structures by an injection current
similarity 0.94K. Neurohr et al.
Source status unknown — claims are unverified
Area-dependence of spin-triplet supercurrent in ferromagnetic Josephson junctions
similarity 0.94Yixing Wang et al.
Source status unknown — claims are unverified