Revealing sign-reversal s+− -wave pairing by quasiparticle interference in the heavy-fermion superconductor CeCu2Si2
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DOI: 10.1103/physrevb.105.014501
Abstract: Recent observations of two nodeless gaps in superconducting CeCu2Si2 have raised intensive debates on its exact gap structure of either sign reversal (s+−) or sign preserving (s) pairing. Here we investigate the quasiparticle interference (QPI)… read more here.
Keywords: fermion superconductor; quasiparticle interference; superconductor cecu2si2; heavy fermion ... See more keywords