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Weak magnetism in insulating and superconducting cuprates

Authors :
Giacomo Claudio Ghiringhelli
Julio C. Cezar
S. Di Matteo
Maurits W. Haverkort
G. M. De Luca
Valentina Bisogni
N. B. Brookes
Marco Salluzzo
Helmuth Berger
M. Moretti Sala
Politecnico di Milano [Milan] (POLIMI)
Institut de Physique de Rennes (IPR)
Université de Rennes 1 (UR1)
Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)
Institut de Physique de la Matière Complexe
Ecole Polytechnique Fédérale de Lausanne (EPFL)
European Synchrotron Radiation Facility (ESRF)
De Luca, G. M.
Ghiringhelli, G.
Moretti Sala, M.
Di Matteo, S.
Haverkort, M. W.
Berger, H.
Bisogni, V.
Cezar, J. C.
Brookes, N. B.
Salluzzo, M.
Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS)
Source :
Physical Review B: Condensed Matter and Materials Physics (1998-2015), Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2010, 82, pp.214504. ⟨10.1103/PHYSREVB.82.214504⟩, Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2010, 82, pp.214504. ⟨10.1103/PHYSREVB.82.214504⟩
Publication Year :
2010
Publisher :
American Physical Society (APS), 2010.

Abstract

International audience; X-ray magnetic circular dichroism provides evidence of an out-of-plane spin moment in undoped and doped cuprates. In La2CuO4 this moment is related to the canting of the antiferromagnetically ordered Cu2+ spins caused by the Dzyaloshinskii-Moriya interaction within the CuO2 planes. This canting gives rise to the well-known weak ferromagnetism in high magnetic fields. We find a similar behavior in doped compounds, both in the normal and in the superconducting state, but with a different temperature dependence typical of paramagnetic systems. This result suggests that, together with short-range in-plane antiferromagnetic correlations, the Dzyaloshinskii-Moriya interaction survives up to optimal doping and in the superconducting state.

Details

ISSN :
1550235X and 10980121
Volume :
82
Database :
OpenAIRE
Journal :
Physical Review B
Accession number :
edsair.doi.dedup.....313e0c08c860e251918117a36dfa056a
Full Text :
https://doi.org/10.1103/physrevb.82.214504