Critical currents in ballistic two-dimensional InAs-based superconducting weak links
J. P. Heida, B. J. van Wees, T. M. Klapwijk, G. Borghs
DOI 10.1103/PhysRevB.60.13135 · Physical Review B
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Abstract
The critical supercurrent Ic carried by a short (0.3 to 0.8 μm) ballistic two-dimensional InAs-based electron gas between superconducting niobium electrodes is studied. In relating the maximum value to the resistance of the weak link in the normal state Rn a much lower value is found than theoretically expected for a ballistic system. The energy scale which characterizes the observed temperature dependence is comparable to the energy associated with the product of Ic and Rn. We point out that although the transport between the electrodes is ballistic, in the InAs underneath the superconducting electrodes the transport is diffusive, an experimental case which has not yet been studied theoretically.
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. | 7 | Pressure not reported | unknown |
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