Competition between superconductivity and weak localization in metal-mixed ion-implanted polymers

Andrew P. Stephenson; Adam P. Micolich; Ujjual Divakar; Paul Meredith; Ben J. Powell

doi:10.1103/PhysRevB.81.144520

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Competition between superconductivity and weak localization in metal-mixed ion-implanted polymers

Andrew P. Stephenson, Adam P. Micolich, Ujjual Divakar, Paul Meredith, Ben J. Powell

DOI 10.1103/PhysRevB.81.144520 · Physical Review B

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Abstract

We study the effects of varying the preimplant film thickness and implant temperature on the electrical and superconducting properties of metal-mixed ion-implanted polymers. We show that it is possible to drive a superconductor-insulator transition in these materials via control of the fabrication parameters. We observe peaks in the magnetoresistance and demonstrate that these are caused by the interplay between superconductivity and weak localization in these films, which occurs due to their granular structure. We compare these magnetoresistance peaks with those seen in unimplanted films and other organic superconductors and show that they are distinctly different.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Sn:Sb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	3	Pressure not reported	midpoint
Sn:Sb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2.9	Pressure not reported	midpoint
Sn:Sb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	3.2	Pressure not reported	onset