2008/01/31 by Makoto Hashimoto, M. Hashimoto, T. Yoshida +17 · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.77.094516
published as Phys. Rev. B 77, 094516 (2008)
arxiv created 2008/03/11 · openalex publication_date 2008/03/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We have performed angle-resolved photoemission and core-level x-ray photoemission studies of the single-layer cuprate Bi2Sr_2\ensuremath-xLaxCuO_6+\ensuremathδ (Bi2201) and revealed the doping evolution of the electronic structure from the lightly doped to optimally doped regions. We have observed the formation of the dispersive quasiparticle band, evolution of the Fermi ``arc'' into the Fermi surface, and the shift of the chemical potential with hole doping as in other cuprates. The doping evolution in Bi2201 is similar to that in Ca_2\ensuremath-xNaxCuO2Cl2 (Na-CCOC), where a rapid chemical potential shift toward the lower Hubbard band of the parent insulator has been observed, but is quite different from that in La_2\ensuremath-xSrxCuO4 (LSCO), where the chemical potential does not shift, yet the dispersive band and the Fermi arc and/or surface are formed around the Fermi level already in the lightly doped region. The (underlying) Fermi surface shape and band dispersions are quantitatively analyzed using tight-binding fit, and the deduced next-nearest-neighbor hopping integral t^\ensuremath' also confirms the similarity to Na-CCOC and the difference from LSCO.