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Model of quasiparticles coupled to a frequency-dependent charge-density-wave order parameter in cuprate
G Seibold1, M Grilli, J Lorenzana
1Institut für Physik, BTU Cottbus, PBox 101344, 03013 Cottbus, Germany.
Abstract:
We investigate a model where superconducting electrons are coupled to a frequency dependent charge-density wave order parameter Delta_{r}(omega). Our approach can reconcile the simultaneous existence of low-energy Bogoljubov quasiparticles and high energy electronic order as observed in scanning tunneling microscopy (STM) experiments. The theory accounts for the contrast reversal in the STM spectra between positive and negative bias observed above the pairing gap. An intrinsic relation between scattering rate and inhomogeneities follows naturally.
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