Weak magnetism in insulating and superconducting cuprates

• Titel: Weak magnetism in insulating and superconducting cuprates
• Mitwirkende: Haverkort, Maurits W. [VerfasserIn]
• Verf.angabe: G.M. De Luca, G. Ghiringhelli, M. Moretti Sala, S. Di Matteo, M.W. Haverkort, H. Berger, V. Bisogni, J.C. Cezar, N.B. Brookes, and M. Salluzzo
• Fussnoten: Gesehen am 06.11.2017
• Titel Quelle: Enthalten in: Physical review / B
• Jahr Quelle: 2010
• Band/Heft Quelle: 82(2010,21) Artikel-Nummer 214504, 6 Seiten
• ISSN Quelle: 1550-235X
• DOI: doi:10.1103/PhysRevB.82.214504
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1565056922

Abstract

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.