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APS » Journals » Phys. Rev. B » Volume 55 » Issue 14
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Phys. Rev. B 55, 9120–9124 (1997)

Temperature-dependent modulation amplitude of the CuO2 superconducting lattice in La2CuO4.1

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A. Lanzara, N. L. Saini, and A. Bianconi
Dipartimento di Fisica and Istituto Nazionale di Fisica Nucleare (INFN), Universit`a di Roma ``La Sapienza,'' 00185 Roma, Italy

J. L. Hazemann and Y. Soldo
Laboratoire de Crystallographie CNRS, Avenue des Martyrs, F-38043 Grenoble, France

F. C. Chou and D. C. Johnston
Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011

The temperature-dependent amplitude of the Cu-O(planar) bond modulation in the La2CuO4.1 superconducting crystal has been measured by in-plane-polarized Cu K-edge extended x-ray-absorption fine structure. Minority domains characterized by a long Cu-O(planar) bond length are found at T<150 K. The separation between the two Cu-O(planar) distances provides a measure of the amplitude of the CuO2 lattice modulation assigned to a charge-density wave that coexists with the superconducting phase, providing evidence for a broken symmetry.

© 1997 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.55.9120
DOI:
10.1103/PhysRevB.55.9120
PACS:
74.72.Dn, 61.10.Ht, 78.70.Dm
 
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