【摘 要】
：
We report 121Sb nuclear quadrupole resonance (NQR) measurements on kagome superconductor CsV3Sb5 with Tc =2.5 K.121Sb NQR spectra split after a charge density wave (CDW) transition at 94 K,which demonstrates a commensurate CDW state.The coexistence of the
【机 构】
：
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics,Chinese Academy of
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We report 121Sb nuclear quadrupole resonance (NQR) measurements on kagome superconductor CsV3Sb5 with Tc =2.5 K.121Sb NQR spectra split after a charge density wave (CDW) transition at 94 K,which demonstrates a commensurate CDW state.The coexistence of the high temperature phase and the CDW phase between 91 K and 94 K manifests that it is a first order phase transition.The CDW order exhibits tri-hexagonal deformation with a lateral shift between the adjacent kagome layers,which is consistent with 2 × 2 × 2 superlattice modulation.The superconducting state coexists with CDW order and shows a conventional s-wave behavior in the bulk state.
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