Fig. 2: Schematics of experiment and sample layout.
From: Superconducting insulators and localization of Cooper pairs
a Long and thin titanium nanowires having the form of narrow strips overlap a relatively wide aluminum electrode through a tunnel barrier (aluminum oxide). The structure enables one to carry out both pseudo-four-terminal measurements of the total resistance for all nanowires and local measurements of the current–voltage characteristics for all Al–AlOx–Ti tunnel junctions. b Scanning electron microscope image of our typical structure. Inset: Zoom of the junction region taken with atomic force microscope. Fake color corresponds to variation of the sample height from 0 (substrate, dark blue) to 80 nm (overlapping titanium, orange).
