Strong Three-magnon Scattering in Cuprates by Resonant X-rays

Details Strong Three-magnon Scattering in Cuprates by Resonant X-rays Strong Three-magnon Scattering in Cuprates by Resonant X-rays

2010-02-19

arxiv.org/abs/1002.3773v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

We show that Resonant Inelastic X-ray scattering (RIXS) is sensitive to three-magnon excitations in cuprates. Even if it requires three electrons to simultaneously flip their spin, the RIXS tri-magnon scattering amplitude is not small. At the Cu $L$-edge its intensity is generally larger than the bi-magnon one and at low transferred momentum even larger than the single-magnon intensity. At the copper $M$-edge the situation is yet more extreme: in this case three-magnon scattering is dominating over all other magnetic channels.

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