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Regular version of the site

Article

Квантовые флуктуации сверхпроводящего параметра порядка

Nanoscale Research Letters. 2016. Vol. 11. No. 364. P. 1-4.
Arutyunov K., Lehtinen J. S.

Tunneling I–V characteristics between very narrow titanium nanowires and “massive” superconducting
aluminum were measured. The clear trend was observed: the thinner the titanium electrode, the broader the
singularity at eV = Δ1(Al) + Δ2(Ti). The phenomenon can be explained by broadening of the gap edge of the
quasi-one-dimensional titanium channels due to quantum fluctuations of the order parameter modulus |Δ2|.
The range of the nanowire diameters, where the effect is pronounced, correlates with dimensions where the
phase fluctuations of the complex superconducting order parameter Δ = |Δ|eiφ, the quantum phase slips,
broadening the R(T) dependencies, have been observed.