Researchers from the Skolkovo Institute of Science and Technology (Skoltech), together with colleagues from China, have synthesized lanthanum-cerium polyhydride, a substance that could facilitate further investigation of superconductors operating at room temperature. The scientists’ work was published in the journal Nature Communications.

A material that conducts electric current without resistance at normal pressure and temperature could be the basis for ultrafast microchips, power lines with no energy loss, and powerful electromagnets for maglev trains and controlled fusion reactors.

In the search for a “chamber” superconductor, various classes of materials are being studied. One of them is polyhydrides, which are substances with a very high hydrogen content. The current record holder for high temperature superconductivity is the lanthanum polyhydride LaH.10. However, it is unstable at pressures below one and a half million atmospheres.

By adding up to 30% cerium to the lanthanum and hydrogen system, scientists have succeeded in obtaining a new superconductor. The material obtained after the reconstruction of the structure turned out to be stable at a pressure of one million atmospheres.

Skoltech professor Artyom Oganov, one of the study’s authors, notes that the study of polyhydrides is unlikely to go beyond high-pressure physics. However, working with them allows us to better understand the principles that would lead to “chamber” superconductivity based on other substances.

Source: Ferra

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