Unusual photoemission resonances of oxygen-dopant induced states in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+x}$

Abstract

We have performed an angular-resolved photoemission study of underdoped, optimally doped and overdoped Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+x}$ samples using a wide photon energy range (15 - 100 eV). We report a small and broad non-dispersive A${}_{1g}$ peak in the energy distribution curves whose intensity scales with doping. We attribute it to a local impurity state similar to the one observed recently by scanning tunneling spectroscopy and identified as the oxygen dopants. Detailed analysis of the resonance profile and comparison with the single-layered Bi${}_2$Sr${}_2$CuO${}_{6+x}$ suggest a mixing of this local state with Cu via the apical oxygens.

arXiv comment4 pages, 4 figures

References in corpus (4)

• Discovery of microscopic electronic inhomogeneity in the high-Tc superconductor Bi2Sr2CaCu2O8+x
• Origin of the peak-dip-hump structure in the photoemission spectra of Bi2212
• What the resonance peak does
• Local electronic structure near oxygen dopants in BSCCO-2212: a window on the high-Tc pair mechanism?

Cited by in corpus (7)

• High Energy Dispersions in Bi2Sr2CaCu2O8 High Temperature Superconductor from Laser-Based Angle-Resolved Photoemission
• Orbital Characters Determined from Fermi Surface Intensity Patterns using Angle-Resolved Photoemission Spectroscopy
• Self-Organized Networks and Lattice Effects in High Temperature Superconductors
• Correlating off-stoichiometric doping with nanoscale electronic disorder and quasiparticle interference pattern in high-$T_c$ superconductor Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Evolution of Fermi surface and normal-state gap in chemically substituted cuprates Bi${}_2$Sr${}_{2-x}$Bi${}_x$CuO${}_{6+\delta }$
• Enhanced Pairing Correlations near Oxygen Dopants in Cuprate Superconductors
• Phase transitions to dipolar clusters and charge density waves in high Tc superconductors