Fate of the superconducting state in floating islands of hybrid nanowire devices
E. V. Shpagina, E. S. Tikhonov, D. Ruhstorfer, G. Koblmüller, V. S. Khrapai
DOI 10.1103/PhysRevB.109.L140501 · Physical Review B
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Abstract
We investigate the impact of transport current on the superconducting order parameter in superconducting islands in full-shell epitaxial Al-InAs nanowires. Depending on the device layout, the suppression of superconductivity occurs in three fundamentally different ways-by a critical current in the case of superconducting reservoirs and by a critical voltage or by a critical Joule power in the case of normal reservoirs. In the latter case, the collapse of the superconducting state depends on the ratio of the dwell time and the electron-phonon relaxation time of quasiparticles in the island. For low resistive and high resistive coupling to the reservoirs, respectively, a relaxation-free regime and a strong electron-phonon relaxation regime are realized. Our results shed light on the potential shortcomings of finite-bias transport spectroscopy in floating islands.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.23 | Pressure not reported | onset |
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.95 | Pressure not reported | onset |
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