Succeeded in generating superconductivity in a much hotter environment than before

"When the metal or compound is cooled to a very low temperature, the electric resistance becomes zero"Superconductivity"Is a dream technology that is expected to be put into practical use because of various merits such as no loss at power transmission. However, since it occurs only in an extremely low temperature state, it is not possible to avoid superconductivity at a higher temperature for practical application, so research on high-temperature superconducting substances is proceeding all over the world I will. Meanwhile, a German research group, in a high temperature environment of 203 K (minus 70 degrees)High Temperature SuperconductorWe succeeded in generating superconductivity with no substances contained in it at all.

Conventional superconductivity at 203 kelvin at high pressures in the sulfur hydride system: Nature: Nature Publishing Group
http://www.nature.com/nature/journal/v525/n7567/full/nature14964.html

The Superconductor That Works at Earth Temperature | MIT Technology Review
http://www.technologyreview.com/view/542856/the-superconductor-that-works-at-earth-temperature/

Superconductivity record bolstered by magnetic data: Nature News & amp; Comment
http://www.nature.com/news/superconductivity-record-bolstered-by-magnetic-data-1.17870

Dr. Michael Eremet of Max Planck Institute and a joint research group of Mainz University found that hydrogen sulfide shows superconductivity at minus 70 degreespaperI made it clear. Thesis isArXivAlthough it impacted the Physics Society as soon as it is published in, as for the superconducting effect occurring under a high temperature environment, even if various papers have been issued so far, it is often found to be an eyebrows thing Initially, it seems that prudent judgment was also required for Dr. Eremit's presentation.

Dr. Eremet et al.Diamond anvil cell (DAC)When it is cooled down in an ultrahigh pressure environment of 2,000,000 atmospheres in the inside, when the electric resistance reaches 203K (minus 70 degrees), the electric resistance becomes zero and the magnetic flux density inside the conductor characteristic of superconductivity Becomes zero "Meissner effectIt was confirmed that. Even after the paper was published in arXiv, Dr. Elemet gathered research data and finally in the form that a paper was posted in science journal Nature in October 2015, and it got a certain certification.


For metal superconductors, the electric resistance becomes zero, indicating the Meissner effect, the transition temperature changes depending on the isotope ratio of the substanceIsotope effectAlthough the features such as are known, the existence of inorganic compounds having superconductivity at minus 110 degrees is known in a mechanism different from these metal superconductors.

Dr. Elemet's research group found that hydrogen sulfide exhibits superconductivity at a high temperature of 203 K, but until now hydrogen sulfide has superconductivity only in an extremely low temperature environment of 40 K (minus 233 ° C.) It was not found. Furthermore, despite the fact that substances indispensable for high-temperature superconductors such as copper and iron are not contained, the discovery of superconductivity at a high temperature has led to the study of this time and the mechanism is almost clarified There are also expectations that the understanding of the mechanism of superconductors other than metal compounds that are not going to be greatly advanced.