30 Mar '16, 3pm

High-temperature superconductivity yields another secret

High-temperature superconductivity yields another secret

Last year, German researchers identified superconductivity in H2 S at -70°C, said to be the highest temperature yet. To get it working, the gas needed compressing to around one million atmospheres. A collaboration between the University of the Basque Country, the Donostia International Physics Center, and researchers from the University of Cambridge have been trying to find out why it superconducts. At low pressure hydrogen atoms form one short and one long bond with neighbouring sulphur atoms, and one theory is that superconductivity can occur once the hydrogen atoms sit exactly half way between the sulphur atoms. When the researchers modelled hydrogen atoms as classical particles, one million atmospheres was not enough to achieve symmetry, while switching to the quantum interpretation of hydrogen atoms as waves yielded pressures similar to the experimental results. "That...

Full article: http://www.electronicsweekly.com/news/research-news/high-...

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