Flux-tunable supercurrent in full-shell nanowire Josephson junctions
G. Giavaras, R. Aguado
DOI 10.1103/PhysRevB.109.024509 · Physical Review B
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Abstract
Full-shell nanowires formed by a semiconducting core fully wrapped by an epitaxial superconducting shell, have recently been introduced as promising hybrid quantum devices. Despite this, however, their properties when forming a Josephson junction (JJ) have not been elucidated yet. We here fill this void by theoretically studying the physics of JJs based on full-shell nanowires. In the hollow-core limit, where the thickness of the semiconducting layer can be ignored, we demonstrate that the critical supercurrent Ic can be tuned by an external magnetic flux Φ. Specifically, Ic(Φ) does not follow the Little-Parks modulation of the superconducting pairing Δ(Φ) and exhibits steps for realistic values of nanowire radii. The position of the steps can be understood from the underlying symmetries of the orbital transverse channels contributing to the supercurrent.
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. | — | Pressure not reported | unknown |
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