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R. G. Herb Condensed Matter Seminars

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The Emergence of Superconductivity in Inhomogeneous Systems
Date: Thursday, October 14th
Time: 10:00 am
Place: 5310 Chamberlin
Speaker: Nadya Mason , UIUC
Abstract: Inhomogeneous superconductivity, where puddle regions or phase separation dominates behavior, is evident in materials ranging from high-temperature superconductors to complex oxides. Yet, although inhomogeneous superconductors have been intensely studied, the nature of the onset of superconductivity in these systems is still largely unknown. In this talk I will present electrical transport measurements of model inhomogeneous superconductors, and discuss the onset and ground states of superconductivity in these systems. First, I will show how superconductivity is established in granular normal-superconducting systems via a “rare-region” or extremal-grain process. I will then show how the ordering and separation of superconducting islands in a normal metal matrix can induce metallic states and other unusual phases. These results are generally relevant to how superconductivity is established in low-dimensional or disordered systems.
Host: Alex Levchenko
Presentation: Inhomogeneous superconductivity.pdf
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