Upper limit of the transition temperature of superconducting materials.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 36419453.
- Also identified by DOI 10.1016/j.patter.2022.100609 and PMC identifier 9676523.
- Licence recorded as CC BY-NC-ND.
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Abstract
Why are the transition temperatures (<i>T</i> <sub>c</sub>) of superconducting materials so different? The answer to this question is not only of great significance in revealing the mechanism of high-<i>T</i> <sub>c</sub> superconductivity but also can be used as a guide for the design of new superconductors. However, so far, it is still challenging to identify the governing factors affecting the <i>T</i> <sub>c</sub>. In this work, with the aid of machine learning and first-principles calculations, we found a close relevance between the upper limit of the <i>T</i> <sub>c</sub> and the energy-level distribution of valence electrons. It implies that some additional inter-orbital electron-electron interaction should be considered in the interpretation of high-<i>T</i> <sub>c</sub> superconductivity.