Excitation of a bosonic mode by electron tunneling into a cuprate superconductor NdBa2Cu3O7-δ

P. Das, M. R. Koblischka, H. Rosner, Th Wolf, U. Hartmann

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We performed scanning tunneling spectroscopic experiments on hole-doped NdBa2Cu3O7-δ. The dI/dV curves obtained at 4.2 K are asymmetric with clear peak, dip, and hump structures. Energy derivatives of these curves show peaks at energies beyond the dip features. Highly precise full potential band-structure calculations confirm a featureless electronic density of states in that energy region. Our results indicate that tunneling electrons couple to a collective mode in the CuO2 plane.

Original languageEnglish
Article number214505
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number21
Publication statusPublished - 2008 Dec 1


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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