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The Challenge of 2-Dimensional Superconductivity
The challenge of two-dimensional superconductivity
Superconductivity as a macroscopic quantum state is present in many systems and characterized by a complex order parameter Y. The common assumption is that amplitude and phase of the order parameter are independent of position and time. However, many superconductors have a large parameter-space in which they have non-zero resistance, an anomalous electrodynamic response and a rich spatial distribution of tunnelling spectra. This marginal superconductivity reflects a macroscopic quantum state in which the order parameter is dependent on position and/or time. The resulting experimental and conceptual challenge will be the focus of the workshop.
Examples we want to address include low superfluid density, low-dimensional systems, such as LSTO, strongly disordered superconductors, such as indium-oxide and the nitrides, and the recent findings of 2-dimensional superconductivity such as in twisted graphene.
The aim of the workshop is to identify the best experimental techniques to elucidate the unusual superfluids described above, to bring the various experimental systems in view and to articulate theoretical strategies to describe and understand this macroscopic quantum state.