Transport properties of zinc-doped YBa2Cu3O7-δ thin films

D J C WALKER, A P MACKENZIE, J R COOPER

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Abstract

We report the results of transport measurements on single-crystal YBa2(Cu1-xZnx)3O7-δ thin films grown by laser ablation. Matthiessen’s rule is obeyed as a function of x at optimum doping (δ∼0.05), but is violated in underdoped samples, where there is evidence from the resistivity that zinc fills in the pseudogap that is observed for samples with x=0, δ ≳0.2. As x and δ are increased, Tc drops rapidly, and a superconductor-insulator transition is observed at a sheet resistance of approximately h/(2e)2 per copper-oxygen bilayer, for various different combinations of x and δ.
Original languageEnglish
Pages (from-to)15653-15656
Number of pages4
JournalPhysical Review. B, Condensed matter
Volume51
Issue number21
DOIs
Publication statusPublished - 1 Jun 1995

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