Inelastic X-ray scattering (Compton) study of La1.85Sr0.15CuO4 - Anisotropic electron momentum distribution

J. Laukkanen, K. Hämäläinen, S. Manninen, A. Shukla, T. Takahashi, K. Yamada, B. Barbiellini, S. Kaprzyk, A. Bansil

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4 Citations (Scopus)


High resolution Compton profiles along two principal symmetry directions (with scattering vector q parallel to [100] and [001]) have been measured from a single crystal of La1.85Sr0.15CuO4 using 58 keV X-rays at a momentum resolution of 0.17 a.u. The measurements are interpreted in terms of highly accurate all-electron computations of the profiles in the parent compound La2CuO4 within the local density approximation (LDA) based conventional band-theory framework, assuming that the resulting metallic state is representative of the Sr-doped compound. Although the experimental anisotropy of the profiles, ΔJ = J[001]-J[100], and the first and second derivatives of the profiles are in reasonable overall accord with the computations, there are striking discrepancies as well. We suggest that these discrepancies may indicate a substantially larger O 2p character of the doped holes in La2CuO4 than implicit in the standard band-theory picture.

Original languageEnglish
Pages (from-to)2249-2256
Number of pages8
JournalJournal of Physics and Chemistry of Solids
Issue number12
Publication statusPublished - 2001 Dec


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