Superconductivity: One Hundred Years to Reach Room Temperature

by Prof. Warren E. Pickett (Department of Physics and Astronomy, University of California Davis)

Monday 5 Sept 2022, 13:00 → 14:00 Europe/Berlin

XHQ/1.173 (Schenefeld)

There is no macroscopic example of quantum behavior more evident, and more well celebrated, than superconductivity. The introduction will begin with the history of increases in critical temperature Tc  over eleven decades.  The progress in formal theory will be recounted, while highlighting its impressive computational implementations over the past 60 years.[1] Then the high-pressure metal hydrides – near room temperature superconductors -- will be discussed, with a straightforward and mostly simple description of how the achievement of HTS does not follow the long anticipated path of very strong coupling. Time permitting, the summary will mention several regularities [2] gleaned from the dozens of calculated predictions in the literature, especially the successes, that may be useful in focusing near-term research directions that could be useful in reducing the required pressure, as well as continuing goal of discovering even higher Tc hydride superconductors.

I acknowledge Yundi Quan and Soham Ghosh for collaboration on this topic.

[1] W. E. Pickett, Room Temperature Superconductivity: the Roles of Theory and Materials Design, Rev. Mod. Phys. (in press); arXiv:2204.05930.

[2] Y. Quan, S. S. Ghosh, and W. E. Pickett, Compressed Hydrides as Metallic Hydrogen Superconductors, Phys. Rev. B 100, 184505 (2019)

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