Superconductivity in metal-mixed ion-implanted polymer films

Micolich, A. P.; Tavenner, E.; Powell, B. J.; Hamilton, A. R.; Curry, M.; Giedd, Ryan E.; Meredith, Paul

doi:10.1063/1.2358190

Cited by 7 publications

(22 citation statements)

References 16 publications

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“…18 As part of an on-going effort to learn how to tune the properties of these systems, we have performed studies on the electrical properties of these systems prior to metal mixing. We have shown that the electrical properties of metallic thin films are remarkably robust to variations in the substrate morphology.…”

Section: Discussionmentioning

confidence: 99%

“…While it has been shown that metal mixed superconducting polymers with a metallic normal state can be produced, their residual resistivity ratios defined as ͑300 K͒ / ͑T c + ͒, where ͑T c + ͒ is the resistance at a temperature slightly above the superconducting transition, are extremely small ͑ϳ1.2͒, indicating that these are extremely disordered systems. 18 This is not unexpected given the manner in which these materials are produced. What is unexpected is the observation that both the critical temperature T c and the critical field B c are lower than that of the unimplanted metal film ͑compare Ref.…”

Section: Introductionmentioning

confidence: 99%

“…This is important for benchmarking the superconducting properties of the metal mixed samples. 18 Current-voltage sweeps were obtained at temperatures down to 1.5 K. Figure 8 shows the temperature dependence of the two terminal resistance between 1.5 and 10.5 K for samples ranging in thickness between 12.5 and 40 nm, the former having the highest residual resistivity. The superconducting transition is significantly broadened, but the onset T c is not suppressed by the decreased film thickness.…”

Section: Fig 6 ͑Color Online͒ Similar Data To That Reported Inmentioning

confidence: 99%

“…It has been shown that this process can give rise to metallic conductivity and even superconductivity. 18 The reports, thus far, of superconductivity in metal mixed polymers are restricted to rather low temperatures ͑2-3 K͒. However the materials properties remain intriguing; most prominently, from a technological perspective, these metal mixed polymer superconductors retain the mechanical flexibility of the parent polymer.…”

Section: Introductionmentioning

confidence: 99%

“…However the materials properties remain intriguing; most prominently, from a technological perspective, these metal mixed polymer superconductors retain the mechanical flexibility of the parent polymer. 18 Further, significant scientific questions still remain concerning the metallic and superconducting states in these systems. For example, the origin of the superconductivity has not yet been identified; is there a thin layer of metal below the surface of the polymer, a a͒ Electronic mail: aps@physics.uq.edu.au.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of metal mixed plastic superconductors: Electrical properties of tin-antimony thin films on plastic substrates

Stephenson

Divakar

Micolich

et al. 2009

Journal of Applied Physics

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Metal mixed polymers are a cheap and effective way to produce flexible metals and superconductors. As part of an on-going effort to learn how to tune the properties of these systems with ion implantation, we present a study of the electrical properties of these systems prior to metal-mixing. We show that the electrical properties of tin-antimony thin films are remarkably robust to variations in the substrate morphology. We demonstrate that the optical absorbance of the films at a fixed wavelength provides a reliable and reproducible characterization of the relative film thickness. We find that as the film thickness is reduced, the superconducting transition in the unimplanted thin films is broadened, but the onset of the transition remains at ∼3.7 K, the transition temperature of bulk Sn. This is in marked contrast to the behavior of metal mixed films, which suggests that the metal mixing process has a significant effect of the physics of the superconducting state beyond that achieved by reducing the film thickness alone.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Fig 6 ͑Color Online͒ Similar Data To That Reported Inmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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