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Positron annihilation study of the electronic structure of CeCu6 and LaCu6

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Il Nuovo Cimento D

Summary

The results of a prelimianry study of the electronic structure of the heavy-fermion system CeCu6 via the two-dimensional angular correlation of electron-positron annihilation radiation (2D ACAR) technique were compared with those obtained for the isostructural reference non-f-electron material LaCu6. The spectra relating to the 2 compounds displayed extremely similar anisotropic structures, with features related to the symmetry of the Brillouin zone. At present, these structures cannot however be attributed to Fermi-surface or positron wave function effects or to anisotropies of some full valence band. In the case of LaCu6, data processing prior to the LCW procedure via new filtering techniques revealed a reasonably good agreement between the LCW data and LAPW Fermi-surface calculations while in the case of CeCu6 it appeared difficult to relate the results, still of controversial interpretation, to any theoretical model.

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Author notes

  1. M. Biasini

    Present address: ENEA, Via don Fimamelli 2, 40128, Bologna, Italy

Authors and Affiliations

  1. H. H. Wills Physics Lab., University of Bristol, BS8 1TL, Bristol, UK

    M. Biasini, H. M. Fretwell, M. A. Alam & S. B. Dugdale

  2. University of Osaka Prefecture, CIAS, 593, Sakai, Osaka, Japan

    H. Harima

  3. University of Texas at Arlington, 76019, TX, Arlington, USA

    R. N. West

  4. Institute of Material Science, University of Tsukuba, 305, Tsukuba, Japan

    Y. Onuki

Authors
  1. M. Biasini
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  2. H. Harima
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  3. H. M. Fretwell
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  4. M. A. Alam
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  5. S. B. Dugdale
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  6. R. N. West
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  7. Y. Onuki
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Biasini, M., Harima, H., Fretwell, H.M. et al. Positron annihilation study of the electronic structure of CeCu6 and LaCu6 . Il Nuovo Cimento D 17, 449–458 (1995). https://doi.org/10.1007/BF02451733

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  • DOI: https://doi.org/10.1007/BF02451733

PACS 78.70.Bj

PACS 71.28

PACS 71.25.Hc

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