What is it about?
A pair density wave is an exotic quantum phase where the superconducting electrons can exhibit spatial modulations. Delicate experiments at extreme conditions (atomic scale, ultra-low temperature, etc) show that such modulations are accompanied by phase sign reversals as that for simple sin/cos functions.
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Why is it important?
The phase sensitive evidence distinguishes the pair density wave state with other trivial mechanisms leading to superconducting modulations, thereby serving as the smoking gun evidence for such an exotic quantum state.
Perspectives
It’s exciting to have this long sought after evidence for the pair density wave state, which has been proposed for 60 years. This also add insights into to recent interests in the unconventional features of Kagome superconductivity.
Jia-Xin Yin
Read the Original
This page is a summary of: Phase-sensitive evidence for pair density waves in a kagome superconductor, Proceedings of the National Academy of Sciences, May 2026, Proceedings of the National Academy of Sciences,
DOI: 10.1073/pnas.2604142123.
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