Calcium superhydrides exhibit superconductivity at temperatures above 210 K
In short: Researchers have experimentally discovered superconductivity in calcium superhydrides at temperatures exceeding 210 K. By using a diamond anvil cell combined with laser heating, the team synthesized these materials under extreme pressures of 160 to 190 GPa and temperatures around 2000 K.
The study used in-situ high-pressure electric conductance measurements and synchrotron X-ray diffraction to analyze the samples. While the results suggest the presence of CaH6, the researchers noted that other calcium hydrides with different hydrogen contents might also exist. This discovery is significant as it expands the group of materials, alongside sulfur and rare-earth hydrides, capable of superconductivity above 200 K.
Why it matters: This discovery identifies a new class of alkaline earth hydrides capable of superconductivity at temperatures well above 200 K.
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Sources
- Source: Research: Li et al. (2022). Superconductivity above 200 K discovered in superhydrides of calcium. Nature Communications. · cc-by
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