Weak magnetism in insulating and superconducting cuprates
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 give...
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| Main Author: | |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
3 December 2010
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| In: |
Physical review. B, Condensed matter and materials physics
Year: 2010, Volume: 82, Issue: 21, Pages: 214504 |
| ISSN: | 1550-235X |
| DOI: | 10.1103/PhysRevB.82.214504 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevB.82.214504 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevB.82.214504 
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| Author Notes: | 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 |
| Summary: | 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. |
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| Item Description: | Gesehen am 06.11.2017 |
| Physical Description: | Online Resource |
| ISSN: | 1550-235X |
| DOI: | 10.1103/PhysRevB.82.214504 |