Terahertz pulse-driven collective mode in the nematic superconducting state of Ba1−xKxFe2As2
نویسندگان
چکیده
Abstract We investigate the collective mode response of iron-based superconductor Ba 1− x K Fe 2 As using intense terahertz (THz) light. In superconducting state a THz Kerr signal is observed and assigned to nonlinear coupling degrees freedom. The polarization dependence remarkably sensitive coexistence nematic order. absence order C 4 symmetric consistent with Higgs amplitude condensate. coexisting becomes purely vanishing component, signaling emergence activated by nematicity.
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ژورنال
عنوان ژورنال: npj quantum materials
سال: 2022
ISSN: ['2397-4648']
DOI: https://doi.org/10.1038/s41535-021-00411-9