Conclusions
Artificially Layered Superconductors are ideal Systems for studying thin film, dimensional, proximity, coupling and superlattice effects. They also serve as model Systems to check theoretical ideas related to the physics of low dimensional and interfacial materials. The layer thickness, presence of large number of interfaces and the strains induced add a large number of variables which enable fine tuning the material properties and creating novel structures and new Systems which do not occur naturally. Until now only a few of these phenomena have been explored in detail so that a quantitative understanding has emerged. Many unexplored problems still exist which have received little or no attention. This includes the study of interaction effects, the changes in the density of states due to the added periodicity, the enhancement of critical currents, the increased pinning in ferromagnetic/superconducting superlattices, the size quantization effects in multilayers containing semimetals, the behavior of nonperiodic multilayers and the studies related to Josephson effects where the periodicity may enhance the emitted radiation. Artificially Layered Superconductors hold promise for use in high critical current tapes, high critical field materials, and as high intensity voltage-controlled Josephson radiators. Finally, the advent of high temperature superconductivity in ceramic oxides allows Artificially Layered Superconductors to be used as a testing ground to distinguish properties and theories which are a consequence of the layered nature and others which are due to more exotic phenomena. Moreover this same technique may help to improve and model the properties of high temperature superconductors, as was done for the conventional ones. Much remains to be done!
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Schuller, I.K., Guimpel, J. & Bruynseraede, Y. Artificially Layered Superconductors. MRS Bulletin 15, 29–36 (1990). https://doi.org/10.1557/S0883769400060437
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DOI: https://doi.org/10.1557/S0883769400060437