Evolution of the density of states at EF of Bi2-yPbySr2-xLaxCuO6+d and Bi2Sr2-xLaxCuO6+d cuprates with hole doping

Abstract

Bi2Sr2-xLaxCuO6+d and Bi2-yPbySr2-xLaxCuO6+d high-Tc superconductors in a wide doping range from overdoped to heavily underdoped were studied by X-ray absorption and photo-emission spectroscopy. The hole concentration p was determined by an analysis of the Cu L3-absorption edge. Besides the occupied density of states derived from photoemission, the un-occupied density of states was determined from the prepeak of the O K-absorption edge. Both, the occupied as well as the unoccupied density of states reveal the same dependence on hole doping, i.e. a continuous increase with increasing doping in the hole underdoped region and a constant density in the hole overdoped region. By comparing these results of single-layer BSLCO with previous results on single-layer LSCO it could be argued that besides the localized holes on Cu sites the CuO2-planes consist of two types of doped holes, from which the so-called mobile holes determine the intensity of the prepeak of the O 1s absorption edge.

References in corpus (11)

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• Layered-specific hole concentrations in Bi2Sr2(Y1-xCax)Cu2O8+d as probed by XANES spectroscopy and coulometric redox analysis
• Thermodynamic and transport properties of underdoped cuprates from ARPES data
• Systematic X-ray absorption study of hole doping in BSCCO - phases

Cited by in corpus (10)

• Measurement of x-ray absorption spectra of overdoped high-temperature cuprate superconductors: Inapplicability of the single-band Hubbard model
• Doping Evolution of Oxygen K-edge X-ray Absorption Spectra in Cuprate Superconductors
• Doping-Dependent Raman Resonance in the Model High-Temperature Superconductor HgBa2CuO4+d
• Microwave conductivity and superfluid density in strongly overdoped Tl2201
• Doping evolution of Zhang-Rice singlet spectral weight: a comprehensive examination by x-ray absorption spectroscopy
• Bulk Fermi surface and momentum density in heavily doped La${}_{2-x}$Sr${}_x$CuO${}_4$ using high resolution Compton scattering and positron annihilation spectroscopies
• Electronic character of charge order in square planar low valence nickelates
• Superconducting correlations induced by charge ordering in cuprate superconductors and Fermi arc formation
• Structural behavior of Pb${}_y$Bi${}_{1.95-y}$Sr${}_{1.49}$La${}_{0.4}$Cu${}_{1.15}$O${}_{6+\delta }$ for 0<y<0.53
• Nonlinear Doping of Cuprate Superconductors -- The case of Bi_2Sr_{2-x}La_xCuO_{6+δ}