A collaborative research team led by Prof. HAO Ning from the Hefei Institutes of Physical Science, Chinese Academy of Sciences, Anhui University, and the University of Science and Technology of China has identified two distinct types of unusual low-energy quasiparticle states in the kagome superconductor CsV3Sb5 using single-atom impurities as local "quantum probes" combined with scanning tunnelling spectroscopy.
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