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Photoemission investigation of the high temperature superconductors La2−x Sr x CuO4

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Zeitschrift für Physik B Condensed Matter

Abstract

Photoemission spectra of the La2−x Sr x CuO4 system which recently has been demonstrated of being capable to produce high temperature (T c >35 K) superconducting compounds are reported. The photoemission spectra of the basic system (La2CuO4) and of samples which contain up to 20% Sr are not significantly different. The density of states at the Fermi energy is small (smaller than that of metallic Cu) and the samples show a possible small shift of the Cu 2p lines towards the trivalent position with increasing tendency to superconductivity. From the Sr 3d spectra a considerable amount of oxygen defects coordinated to the Sr ions is estimated.

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Authors and Affiliations

  1. Fachbereich Physik, Universität des Saarlandes, D-6600, Saarbrücken, Federal Republic of Germany

    P. Steiner, J. Albers, V. Kinsinger, I. Sander, B. Siegwart & S. Hüfner

  2. Institut für Nukleare Festkörperphysik, Kernforschungszentrum Karlsruhe, Postfach 3640, D-7500, Karlsruhe, Federal Republic of Germany

    C. Politis

Authors
  1. P. Steiner
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  2. J. Albers
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  3. V. Kinsinger
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  4. I. Sander
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  5. B. Siegwart
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  6. S. Hüfner
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  7. C. Politis
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Steiner, P., Albers, J., Kinsinger, V. et al. Photoemission investigation of the high temperature superconductors La2−x Sr x CuO4 . Z. Physik B - Condensed Matter 66, 275–278 (1987). https://doi.org/10.1007/BF01305416

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  • DOI: https://doi.org/10.1007/BF01305416

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