Article ID Journal Published Year Pages File Type
1518479 Journal of Physics and Chemistry of Solids 2005 5 Pages PDF
Abstract

Momentum dependent charge excitation of 2D cuprate class La2−xSrxCuO4 with different hole-doping levels (x) is measured using high resolution resonant inelastic X-ray scattering. Although a low-energy continuum is built up with doping, a remnant excitation gap behavior continues to exist even in highly doped metallic phase which we have studied in some detail. The excitation of the Mott gap becomes less dispersive with the increase of doping level and suggests a many-body coupling between charge fluctuation and magnetic character of the lattice. The results can be described within the framework of t–t′–t″–U model.

Related Topics
Physical Sciences and Engineering Materials Science Electronic, Optical and Magnetic Materials
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