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Structural and magnetic instabilities of La2xSrxCaCu2O6

C. Ulrich, S. Kondo, M. Reehuis, H. He, C. Bernhard, C. Niedermayer, F. Bourée, P. Bourges, M. Ohl, H. M. Rønnow, H. Takagi, and B. Keimer
Phys. Rev. B 65, 220507(R) – Published 31 May 2002
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Abstract

A neutron-scattering study of nonsuperconducting La2xSrxCaCu2O6 (x=0 and 0.2), a bilayer copper oxide without CuO chains, has revealed an unexpected tetragonal-to-orthorhombic transition with a doping dependent transition temperature. The predominant structural modification below the transition is an in-plane shift of the apical oxygen. In the doped sample, the orthorhombic superstructure is strongly disordered, and a glassy state involving both magnetic and structural degrees of freedom develops at low temperature. The spin correlations are commensurate.

  • Received 2 January 2002

DOI:https://doi.org/10.1103/PhysRevB.65.220507

©2002 American Physical Society

Authors & Affiliations

C. Ulrich1, S. Kondo2, M. Reehuis3, H. He1, C. Bernhard1, C. Niedermayer4, F. Bourée5, P. Bourges5, M. Ohl6, H. M. Rønnow7, H. Takagi2, and B. Keimer1

  • 1Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
  • 2Department of Advanced Materials Science, School of Frontier Sciences, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8656, Japan
  • 3Hahn-Meitner-Institut, Glienicker Strasse 100, D-14109 Berlin, Germany
  • 4Department of Physics, Universität Konstanz, D-78434 Konstanz, Germany
  • 5Laboratoire León Brillouin, CEA-CNRS, CE Saclay, 91191 Gif sur Yvette, France
  • 6Institut Laue–Langevin, 156X, 38042 Grenoble Cedex 9, France
  • 7CEA (MDN/SPSMS/DRFMC), 38054 Grenoble, France

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Issue

Vol. 65, Iss. 22 — 1 June 2002

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