What is it about?
Two superconducting domes are commonly found in unconventional superconductors. Two superconducting domes found in FeSe-based superconductors exhibit unique normal state resistivity and pure nematic QCP. Our results support the possibility of two different pairing mechanisms in FeSe-based superconductors, providing valuable clues for studying these two superconducting domes.
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Why is it important?
The evolution of the Dirac states indicates that the two superconducting domes in FeSe-based superconductors have different electronic structures. The normal state resistivity on superconducting dome SC1 shows the strange metal state, with a power exponent approximately equal to 1, whereas the exponent on SC2 is less than 1. The distinct Dirac states and normal state resistivity across the two superconducting domes, providing convincing evidence for the existence of the two different pairing mechanisms in FeSe- based superconductors.
Perspectives
I am very happy that this article is a summary of the 11 iron-based system and lays a good foundation for subsequent research. In addition, it provides a detailed and accurate phase diagram for the exploration of high-temperature superconductors, which triggers people's deeper thinking.
Qiang Hou
Southeast University
Read the Original
This page is a summary of: Bulk and surface Dirac states accompanied by two superconducting domes in FeSe-based superconductors, Proceedings of the National Academy of Sciences, November 2024, Proceedings of the National Academy of Sciences,
DOI: 10.1073/pnas.2409756121.
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