Nonlocality in superconducting microstructures
K. Yu. Arutyunov, J. P. Pekola, A. B. Pavolotski, D. A. Presnov
DOI 10.1103/PhysRevB.64.064519 · Physical Review B
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Abstract
We discuss experimental evidence of nonlocality in superconducting nanostructures: the variation of the magnitude of the order parameter Δ(r) induces a response at a remote point r′. It is shown that reasonable agreement with experiment can be achieved by assuming nonlocal integral relation between Δ(r) and Δ(r′) with the kernel function K(r,r′)∝(1/|r−r′|)exp(−|r−r′|/ξΔ). Numerically the correlation length ξΔ is close to the effective Pippard’s coherence length 0.18ξ0Pip, while its dependence on the critical temperature Tc is different than the conventional diverging behavior at the critical point T→Tc.
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. | 1.35 | Pressure unresolved | onset |
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.2 | Pressure unresolved | onset |
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