Nonlocality in mesoscopic Josephson junctions with strip geometry
Urs Ledermann, Alban L. Fauchère, Gianni Blatter
DOI 10.1103/PhysRevB.59.R9027 · Physical Review B
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Abstract
We study the current in a clean superconductor–normal-metal–superconductor junction of length d and width w in the presence of an applied magnetic field H. We show that both the geometrical pattern of the current density and the critical current Ic(Φ), where Φ is the total flux in the junction, depend on the ratio of the Josephson vortex distance a0=Φ0/Hd and the range r∼dξN of the nonlocal electrodynamics [Φ0=hc/2e, ξN=ħvF/2πT, and r(T→0)∼d]. In particular, the critical current has the periodicity of the superconducting flux quantum Φ0 only for r<a0 and becomes, due to boundary effects, 2Φ0 (pseudo)periodic for strong nonlocality, r>a0. Comparing our results to recent experiments of Heida et al. [Phys. Rev. B 57, R5618 (1998)] we find good agreement.
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. | — | Pressure not reported | unknown |
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