Antiferromagnetic Ordering in Superconducting <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>YBa</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow><mrow><msub><mrow><mi>Cu</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow><mrow><msub><mrow><mi>O</mi></mrow><mrow><mn>6.5</mn></mrow></msub></mrow></math></span>

Y. Sidis; C. Ulrich; P. Bourges; C. Bernhard; C. Niedermayer; L. P. Regnault; N. H. Andersen; B. Keimer

doi:10.1103/PhysRevLett.86.4100

Antiferromagnetic Ordering in Superconducting ${YBa}_{2} {Cu}_{3} O_{6.5}$

Y. Sidis, C. Ulrich, P. Bourges, C. Bernhard, C. Niedermayer, L. P. Regnault, N. H. Andersen, and B. Keimer

Phys. Rev. Lett. 86, 4100 – Published 30 April 2001

Abstract

Commensurate antiferromagnetic ordering has been observed in the superconducting high- $T_{c}$ cuprate ${YBa}_{2} {Cu}_{3} O_{6.5}$ ( $T_{c} = 55 K$ ) by polarized and unpolarized elastic neutron scattering. The magnetic peak intensity exhibits a marked enhancement at $T_{c}$ . Zero-field muon-spin-resonance experiments demonstrate that the staggered magnetization is not truly static but fluctuates on a nanosecond time scale. These results point towards an unusual spin density wave state coexisting with superconductivity.

Received 8 January 2001

DOI:https://doi.org/10.1103/PhysRevLett.86.4100

Authors & Affiliations

Y. Sidis¹, C. Ulrich², P. Bourges¹, C. Bernhard², C. Niedermayer³, L. P. Regnault⁴, N. H. Andersen⁵, and B. Keimer²

¹Laboratoire Léon Brillouin, CEA-CNRS, CE Saclay, 91191 Gif sur Yvette, France
²Max-Planck-Institut für Festkörperforschung, 70569 Stuttgart, Germany
³University of Konstanz, 78434 Konstanz, Germany
⁴Département de Recherche Fondamentale sur la matière Condensée, CEA Grenoble, 38054 Grenoble Cedex 9, France
⁵Condensed Matter Physics and Chemistry Department, Risø National Laboratory, DK-4000 Roskilde, Denmark