Electronic structure of Nd 2-xCe xCuO 4 and La 2-xSr xCuO 4 deduced from Cu 2 p photoemission and photoabsorption

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The electronic structures of Nd 2-xCe xCuO 4 and La 2-xSr xCuO 4 are studied using numerical diagonalization calculations for cluster models, Cu 5O 16, Cu 7O 20, and Cu 8O 16. The Fermi energy of Nd 2CuO 4 used in the experiment is assumed to be pinned at the bottom of the upper Hubbard band, while that of La 2CuO 4 is assumed to be pinned at the top of the Zhang Rice singlet band. This assumption enables us to consistently understand the doping dependence of the Cu 2 p photoemission and photoabsorption spectra in Nd 2-xCe xCuO 4 and La 2-xSr xCuO 4 on the basis of the so-called "crossing the gap" picture. The present calculation of Cu 2 p photoemission spectrum also shows that core hole screening caused by charge transfer between neighboring CuO 4 plaquettes, in other words, nonlocal screening (NLS), is important in Nd 2CuO 4 as well as in La 2CuO 4.

Original languageEnglish
Article number034725
Journaljournal of the physical society of japan
Volume78
Issue number3
DOIs
Publication statusPublished - Mar 1 2009

Keywords

  • Chemical shift, Nd Ce CuO , La Sr CuO
  • Cu 2 photoemission
  • Dp model
  • Nonlocal screening
  • X-ray absorption
  • Zhang Rice singlet

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Electronic structure of Nd <sub>2-x</sub>Ce <sub>x</sub>CuO <sub>4</sub> and La <sub>2-x</sub>Sr <sub>x</sub>CuO <sub>4</sub> deduced from Cu 2 <sub>p</sub> photoemission and photoabsorption'. Together they form a unique fingerprint.

  • Cite this