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> The title here is sort of confusing-thinner films? Thinner than what? And what are these thin films made of?

You answer all your questions if you read the first paragraph of the article. The second paragraph even specified the exact material and thickness.

The only thing I think that the title could make clearer is that this is at or below nm scale, but that too is in the first paragraph.

Conductivity: Film at Eleven

"New niobium thin film conducts better than copper" would have been my choice, but it would probably get butchered by the autofilter to something as useless as the current title anyway, because 'new' is probably elided, as would 'than'.