Probing the singlet character of the two-hole states in cuprate superconductors

G. Ghiringhelli*, N. B. Brookes, L. H. Tjeng, T. Mizokawa, O. Tjernberg, P. G. Steeneken, A. A. Menovsky

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

7 Citations (Scopus)


Using spin-resolved resonant photoemission we have probed the singlet vs. triplet character of the two-hole state in the layered cuprates Bi2Sr2CaCu2O8+δ, La2-xSrxCuO4 and Sr2CuO2Cl2. The combination of the photon circular polarization with the photoelectron spin detection gives access to the character of the photoemission final states, which correspond to the two-hole configurations localized at a (CuO4) site. In particular, the lowest energy state is found to have a very high singlet character in all the measured compounds. This can be considered as a strong indication of the existence and stability of the so-called Zhang-Rice singlets in the layered cuprates.

Original languageEnglish
Pages (from-to)34-35
Number of pages2
JournalPhysica B: Condensed Matter
Publication statusPublished - 2002 Mar
Externally publishedYes
EventInternational Conference on Strongly Correlated Electrons - Ann Arbor, MI, United States
Duration: 2002 Aug 62002 Aug 6


  • Cuprate
  • Photoemission
  • Zhang-Rice singlet

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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