Measurement of an Anisotropic Energy Gap in Single PlaneBi2Sr2−xLaxCuO6+δ

1997/05/29 by J. M. Harris, Jeffrey M. Harris, P. J. White +16 · 4 citations
Engineering · Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Superconducting Materials and Applications #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.79.143

Revtex, 4 pages, 3 ps figures

arxiv created 1997/05/29 · openalex publication_date 1997/07/07 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We report angle-resolved photoemission spectra both above and below T_c in the single-plane cuprate superconductor Bi₂Sr_2\ensuremath-xLa_xCuO_6+\ensuremathδ. The superconducting state measurements show a highly anisotropic excitation gap with a maximum magnitude smaller than that of the bilayer compound Bi₂Sr₂CaCu₂O₈ by a factor of 3. For a range of doping, the gap persists well above T_c, behavior previously associated with underdoped bilayer cuprates. The anisotropy and magnitude of the normal-state gap are very similar to the superconducting state gap, indicating that the two gaps may have a common origin in a pairing interaction.

Citations

• Theory of Underdoped Cuprates

Cited by

• Test of the Wiedemann-Franz Law in an Optimally Doped Cuprate
• Electronic excitations near the Brillouin zone boundary ofBi2Sr2CaCu2O8+δ
• Quasiparticle density of states ofBi2Sr2CaCu2O8+δsingle crystals probed using tunneling spectroscopy in the30–50<mml:mspace width="0.3em"/>mKtemperature range in high magnetic fields
• Angle-resolved photoemission studies of the cuprate superconductors