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Full-Text Articles in Physical Sciences and Mathematics
Matrix Element Effects In Angle-Resolved Photoemission From Bi₂Sr₂Cacu₂O₈: Energy And Polarization Dependencies, Final State Spectrum, Spectral Signatures Of Specific Transitions, And Related Issues, M. Lindroos, S. Sahrakorpi, A. Bansil
Matrix Element Effects In Angle-Resolved Photoemission From Bi₂Sr₂Cacu₂O₈: Energy And Polarization Dependencies, Final State Spectrum, Spectral Signatures Of Specific Transitions, And Related Issues, M. Lindroos, S. Sahrakorpi, A. Bansil
Arun Bansil
We have carried out extensive simulations of the angle-resolved photoemission (ARPES) intensity in Bi2212 within the one-step- and three-step-type models using a first-principles band theory framework. The focus is on understanding the behavior of emissions from the antibonding and bonding bands arising from the CuO₂ bilayers around the M̅ (π,0) symmetry point. The specific issues addressed include: Dependencies of the photointensity on the energy and polarization of the incident light; character of the initial and final states involved as well as the spectrum of the relevant final states; and changes in the spectral intensity as a function of the perpendicular …
Influence Of The Third Dimension Of Quasi-Two-Dimensional Cuprate Superconductors On Angle-Resolved Photoemission Spectra, A. Bansil, M. Lindroos, S. Sahrakorpi, R. S. Markiewicz
Influence Of The Third Dimension Of Quasi-Two-Dimensional Cuprate Superconductors On Angle-Resolved Photoemission Spectra, A. Bansil, M. Lindroos, S. Sahrakorpi, R. S. Markiewicz
Arun Bansil
Angle-resolved photoemission spectroscopy (ARPES) presents significant simplifications in analyzing strictly two-dimensional (2D) materials, but even the most anisotropic physical systems display some residual three-dimensionality. Here we demonstrate how this third dimension manifests itself in ARPES spectra of quasi-2D materials by considering the example of the cuprate Bi₂Sr₂CaCu₂O₈ (Bi2212). The intercell, interlayer hopping, which is responsible for kz dispersion of the bands, is found to induce an irreducible broadening to the ARPES line shapes with a characteristic dependence on the in-plane momentum k‖. Our study suggests that ARPES line shapes can provide a direct spectroscopic window for establishing the existence of …