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Influence of doping on the electronic structure of (La, Sr)2CuO4 (1994)

Howell, R. H. ; Sterne, P. A. ; Fluss, M. J. ; [weitere]

Springer

Journal of superconductivity 7 (1994), S. 169-173

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Details

ISSN: 1572-9605

Schlagwort(e): La2−x Sr x CuO4 ; positron annihilation ; ACAR ; Fermi surface ; Sr doping ; electronic structure

Quelle: Springer Online Journal Archives 1860-2000

Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Physik

Notizen: Abstract High-statistics (〉4 × 108 counts), room-temperature measurements of the electron-positron momentum density of La2−x Sr 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.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00730389

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