2005/03/31 by H. Onodera, Takami Tohyama, T. Tohyama +4
Materials Science · Physics and Astronomy · #Advanced Chemical Physics Studies #Electronic and Structural Properties of Oxides #Physics of Superconductivity and Magnetism #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.72.012508
published as Phys. Rev. B 72, 012508 (2005) (4 pages) · 5 pages, 4 figures
openalex publication_date 2005/07/18 · arxiv created 2005/07/21 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We propose angle-resolved two-photon photoemission spectroscopy (AR-2PPES) as a technique to detect the location of the bottom of the upper Hubbard band (UHB) in two-dimensional insulating cuprates. The AR-2PPES spectra are numerically calculated for small Hubbard clusters. When the pump photon excites an electron from the lower Hubbard band, the bottom of the UHB is less clear, but when an electron in the nonbonding oxygen band is excited, the bottom of the UHB can be identified clearly, accompanied with additional spectra originated from the spin-wave excitation at half filling.