The practical realization of high temperature superconductivity would immediately relegate the Global Warming hoax and the Climate Change religion to the dustbin of history where they belong!
"... Superconductivity was predicted in nickel-based oxide compounds, or nickelates, more than 20 years ago, yet only realized experimentally for the first time in 2019, and only in samples that are grown as very thin, crystalline films – less than 20 nanometers thick – layered on a supporting substrate material. ...
This limitation led some researchers to speculate that superconductivity was not being hosted in the nickelate film, but rather at the atomic interface where the film and substrate meet. ...
What they discovered was an intermediate compound formed at the interface – one that had never been predicted and that alleviated the kind of electronic charge buildup that could give rise to superconductivity. The finding proved that the previously proposed model of a superconducting interface is not valid – the superconductivity is instead occurring in the nickelate film itself. ...
The discovery is encouraging for the field because it shows that superconductivity may not be reliant on the thin-film geometry. This means that creation of superconducting bulk crystals theoretically should be possible ..."
What they discovered was an intermediate compound formed at the interface – one that had never been predicted and that alleviated the kind of electronic charge buildup that could give rise to superconductivity. The finding proved that the previously proposed model of a superconducting interface is not valid – the superconductivity is instead occurring in the nickelate film itself. ...
The discovery is encouraging for the field because it shows that superconductivity may not be reliant on the thin-film geometry. This means that creation of superconducting bulk crystals theoretically should be possible ..."
From the abstract:
"Nickel-based superconductors provide a long-awaited experimental platform to explore possible cuprate-like superconductivity. Despite similar crystal structure and d electron filling, these systems exhibit several differences. Nickelates are the most polar layered oxide superconductor, raising questions about the interface between substrate and thin film -- thus far the only sample geometry to successfully stabilize superconductivity. We conduct a detailed experimental and theoretical study of the prototypical interface between Nd1−xSrxNiO2 and SrTiO3. Atomic-resolution electron energy loss spectroscopy in the scanning transmission electron microscope reveals the formation of a single intermediate Nd(Ti,Ni)O3 layer. Density functional theory calculations with a Hubbard U term show how the observed structure alleviates the strong polar discontinuity. We explore effects of oxygen occupancy, hole doping, and cation structure to disentangle the contributions of each for reducing interface charge density. Resolving the nontrivial interface structure will be instructive for future synthesis of nickelate films on other substrates and in vertical heterostructures."
Reconstructing the polar interface of infinite-layer nickelate thin films (open access, preprint, will be published in Nature Materials)
How about these two supercool researchers!
Lena Kourkoutis, left, associate professor of applied and engineering physics, and Berit Goodge, Ph.D. ’22, with the scanning transmission electron microscope.
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