Excitation of a bosonic mode by electron tunneling into a cuprate superconductorNdBa2Cu3O7−δ

2008/10/15 by P. Das, Pintu Das, M. R. Koblischka +6
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Iron-based superconductors research #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.78.214505

published as Phys. Rev. B, 78, 214505 (2008) · 5 pages, 4 figures

arxiv created 2008/10/15 · openalex publication_date 2008/12/05 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

Abstract

We performed scanning tunneling spectroscopic experiments on hole-doped NdBa₂Cu₃O_7\ensuremath-\ensuremathδ. 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.

Citations

• Origin of the Peak-Dip-Hump Line Shape in the Superconducting-State(π,0)Photoemission Spectra ofBi2Sr2CaCu2O8
• Coupling of theB1gPhonon to the Antinodal Electronic States ofBi2Sr2Ca0.92Y0.08Cu2O8+δ
• Electronic Spectra and Their Relation to the(π,π)Collective Mode in High-TcSuperconductors