News

News

Thorium Superconductivity: New High-Temperature Superconductor Discovered

Date: 2019-11-11
Views: 237

Thorium Superconductivity: New High-Temperature Superconductor Discovered


A group of scientists led by Artem Oganov of Skoltech and the Moscow Institute of Physics and Technology, and Ivan Troyan of the Institute of Crystallography of RAS has succeeded in synthesizing thorium decahydride (ThH10), a new superconducting material with the very high critical temperature of 161 kelvins. 


A truly remarkable property of quantum materials, superconductivity is the complete loss of electrical resistance under quite specific, and sometimes very harsh, conditions. Despite the tremendous potential for quantum computers and high-sensitivity detectors, the application of superconductors is hindered by the fact that their valuable properties typically manifest themselves at very low temperatures or extremely high pressures.


Until recently, the list of superconductors was topped by a mercury-containing cuprate, which becomes superconducting at 135 kelvins, or −138 degrees Celsius. This year, lanthanum decahydride, LaH10, set a new record of −13 C, which is very close to room temperature. Unfortunately, that superconductor requires pressures approaching 2 million atmospheres, which can hardly be maintained in real-life applications. Scientists, therefore, continue their quest for a superconductor that retains its properties at standard conditions.


In 2018, Alexander Kvashnin, a researcher at Oganov’s lab, predicted a new material — thorium polyhydride, or ThH10 (fig. 1) — with a critical temperature of −32 C, stable under 1 million atmospheres. In a recent study, researchers from Skoltech, MIPT, the Institute of Crystallography and Lebedev Institute of Physics of the Russian Academy of Sciences (RAS) have successfully obtained ThH10 and studied its transport properties and superconductivity.


The team’s findings corroborated the theoretical predictions, proving that ThH10 exists at pressures above 0.85 million atmospheres and exhibits amazing high-temperature superconductivity. The scientists could only determine the critical temperature at 0.7 million atmospheres and found it to be −112 C, which is consistent with the theoretical prediction for that pressure value. This makes ThH10 one of the record-breaking high-temperature superconductors.


“Modern theory, and in particular, the USPEX method developed by myself and my students, yet again displayed their amazing predictive power,” said Skoltech and MIPT Professor Artem Oganov, who co-directed the study. “ThH10 pushes the boundaries of classical chemistry and possesses unique properties that were predicted theoretically and recently confirmed by experiment. Most notably, the experimental results obtained by Ivan Troyan’s lab are of very high quality.”


“We discovered that superconductivity predicted in theory does exist at −112 C and 0.7 million atmospheres,” study co-director Ivan Troyan added. “Given the strong consistency between theory and experiment, it would be interesting to check whether ThH10 will show superconductivity at up to −30 C…−40 C and lower pressures as predicted.”


“Thorium hydride is just one of the elements in a large and rapidly growing class of hydride superconductors,” said the first author of the study, Skoltech PhD student Dmitry Semenok. “I believe that in the coming years, hydride superconductivity will expand beyond the cryogenic range to find application in the design of electronic devices.”


Via: https://scitechdaily.com/thorium-superconductivity-new-high-temperature-superconductor-discovered/

News / Recommended news More
2020 - 01 - 22
Replacing the volatile and flammable liquid or polymer electrolytes now used in lithium-ion batteries with inorganic solid-state lithium-ionic ceramic conductors could significantly improve both safety and performance of the cells. Solid-state conductors would allow for novel cathode and anode chemistry, prevent the growth of Li-metal dendrites and push miniaturization.Though researchers have inve...
2020 - 01 - 16
Last week India’s aluminium industry called upon New Delhi to cut basic customs duties on aluminium fluoride and other raw materials necessary for aluminium production, as such duties make it all but impossible for domestic producers to compete in the global marketplace.In comments regarding the proposed Union Budget for the next fiscal year, the Aluminium Association of India (AAI) aske...
2020 - 01 - 10
Lithium-ion batteries are notorious for developing internal electrical shorts that can ignite a battery's liquid electrolytes, leading to explosions and fires. Engineers at the University of Illinois have developed a solid polymer-based electrolyte that can self-heal after damage -- and the material can also be recycled without the use of harsh chemicals or high temperatures.The new study could he...
2020 - 01 - 03
When the volcano, Eyjafjallajökull, erupted in Iceland in 2010, it paralyzed air traffic in large parts of Europe. Volcanoes pose a threat to aircrafts as ash, which commonly contains calcium magnesium aluminum silicates (CMAS), causes significant damage to turbines. Similarly, fly ash, which is a fine powder produced as a byproduct of burning pulverized coal in electric generation power plan...
Share:
Uniris Exhibition Shanghai Co., Ltd.
Shanghai Branch
Tel: 4000 778 909 
E-mail:irisexpo@163.com

Guangzhou Branch
Tel: 020-8327 6389
E-mail:iacechina@unifair.com

IACE CHINA Official Website
犀牛云提供企业云服务
犀牛云提供云计算服务
Scan