【摘 要】
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Exotic quantum phenomena may appear in material systems with multiple orders or phases,where the mutual interactions can give rise to new physics beyond that of each component.Here,we report spec-troscopic evidence for a unique combination of topology and
【机 构】
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Department of Physics and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics,University o
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Exotic quantum phenomena may appear in material systems with multiple orders or phases,where the mutual interactions can give rise to new physics beyond that of each component.Here,we report spec-troscopic evidence for a unique combination of topology and correlation effects in the kagome supercon-ductor CsV3Sbs.Topologically nontrivial surface states are observed near the Fermi energy (EF),indicating that the topological physics may be active upon entering the superconducting state.Flat bands are observed,suggesting that electron correlation effects are also at play in this system.Our results reveal the peculiar electronic structure of CsV3Sb5,which holds the potential for realizing Majorana zero modes and anomalous superconducting states in kagome lattices.They also establish CsV3Sb5 as a unique plat-form for exploring the interactions between the charge order,topology,correlation effects and superconductivity.
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