Journal of Superconductivity

, Volume 7, Issue 1, pp 169–173 | Cite as

Influence of doping on the electronic structure of (La, Sr)2CuO4

  • R. H. Howell
  • P. A. Sterne
  • M. J. Fluss
  • J. H. Kaiser
  • K. Kitazawa
  • H. Kojima
V. Carrier Concentration; Overdoped Region


High-statistics (>4 × 108 counts), room-temperature measurements of the electron-positron momentum density of La2−xSr x CuO4 have been performed for samples with Sr concentrations of x=0.0, 0.1, 0.13, and 0.2. These spectra have been analyzed in conjunction with theoretical calculations of the electron-positron momentum density. The metallic samples show features consistent with the presence of a Fermi surface, but its evolution with increasing Sr concentration does not follow the predictions of band theory. These results may indicate the effects of electron-electron correlation on the electron momentum distribution in the Cu-O plane.

Key words

La2−xSrxCuO4 positron annihilation ACAR Fermi surface Sr doping electronic structure 


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Copyright information

© Plenum Publishing Corporation 1994

Authors and Affiliations

  • R. H. Howell
    • 1
  • P. A. Sterne
    • 1
    • 2
  • M. J. Fluss
    • 1
  • J. H. Kaiser
    • 3
  • K. Kitazawa
    • 4
  • H. Kojima
    • 5
  1. 1.Lawrence Livermore National LaboratoryLivermore
  2. 2.University of CaliforniaDavis
  3. 3.University of Texas at Arlington
  4. 4.University of TokyoTokyoJapan
  5. 5.Yamanashi UniversityKofuJapan

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