2009/01/31 by S. P. Zhao, Xuebin Zhu, X. B. Zhu +2 · 14 citations
Materials Science · Physics and Astronomy · #Condensed matter physics #Cuprate #Iron-based superconductors research #Josephson effect #Pairing #Physics #Physics of Superconductivity and Magnetism #Pseudogap #Quantum mechanics #Quantum tunnelling #Quasiparticle #Scattering rate #Spectral line #Superconductivity #Superconductivity in MgB2 and Alloys #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1140/epjb/e2009-00299-7
published in The European Physical Journal B 71(2), 195-201 (Springer Science+Business Media) · 7 pages, 6 figures
openalex publication_date 2009/09/01 · arxiv created 2009/10/17 · arxiv updated 2015/05/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Tunneling spectra of near optimally doped, submicron Bi2Sr2CaCu2O8+δ intrinsic Josephson junctions are presented, and examined in the region where the superconducting gap evolves into pseudogap. The spectra are analyzed using a self-energy model, proposed by Norman \it et al., in which both quasiparticle scattering rate Γ and pair decay rate ΓΔ are considered. The density of states derived from the model has the familiar Dynes' form with a simple replacement of Γ by γ+ = (Γ + ΓΔ)/2. The γ+ parameter obtained from fitting the experimental spectra shows a roughly linear temperature dependence, which puts a strong constraint on the relation between Γ and ΓΔ. We discuss and compare the Fermi arc behavior in the pseudogap phase from the tunneling and angle-resolved photoemission spectroscopy experiments. Our results indicate an excellent agreement between the two experiments, which is in favor of the precursor pairing view of the pseudogap.