Abstract
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
= [delta]1(Al)+[delta]2(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 |?2|. The
range of the nanowire diameters, where the effect is
pronounced, correlates with dimensions where the phase
fluctuations of the complex superconducting order
parameter [delta] = |[delta]|ei[phi], the quantum phase
slips, broadening the R(T) dependencies, have been
observed.
Original language | English |
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Journal | Nanoscale Research Letters |
Volume | 11 |
Issue number | 364 |
DOIs | |
Publication status | Published - 2016 |
MoE publication type | A1 Journal article-refereed |
Keywords
- quasi-one-dimensional superconductivity
- quantum fluctuations
- tunneling