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Thermal-expansion-derived lattice instability in La2CuO4

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Zeitschrift für Physik B Condensed Matter

Abstract

We present results for the thermal expansion, α(T), of both polycrystalline and single crystalline La2CuO4. Our results demonstrate the existence of an anomaly in α(T) aroundT=35 K which is clearly intrinsic and most likely due to a lattice instability.

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  11. It should be noted that a third measurement on this single crystal performed about 3 months later led again to qualitatively the same anomaly but to a 30% higher absolute value of α(T) in the whole temperature regime. This shows that at least part of the crystal has deteriorated during storage in a so far unexplained way

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Authors and Affiliations

  1. Institut für Festkörperphysik, Technische Hochschule Darmstadt, Hochschulstrasse 2, D-6100, Darmstadt, Federal Republic of Germany

    M. Lang, A. Höhr, H. Spille & F. Steglich

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

    H. Rietschel & G. Roth

  3. NTT Electrical Comm. Labs., Nippon Telegraph & Telephone Corp., Tokai-Mura, Naka-Gun, 319-11, Ibaraki-Ken, Japan

    Y. Hidaka & T. Murakami

Authors
  1. M. Lang
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  2. A. Höhr
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  3. H. Spille
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  4. F. Steglich
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  5. H. Rietschel
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  6. G. Roth
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  7. Y. Hidaka
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  8. T. Murakami
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Lang, M., Höhr, A., Spille, H. et al. Thermal-expansion-derived lattice instability in La2CuO4 . Z. Physik B - Condensed Matter 74, 3–4 (1989). https://doi.org/10.1007/BF01307233

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  • DOI: https://doi.org/10.1007/BF01307233

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