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Dispersion of the neutron resonance in cuprate superconductors

Andrey V. Chubukov·Boldizsar Janko·Oleg Tchernyshyov
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Abstract

We argue that recently measured downward dispersion of the neutron resonance peak in cuprate superconductors is naturally explained if the resonance is viewed as a spin-1 collective mode in a d-wave superconductor. The reduction of the resonant frequency away from the antiferromagnetic wave vector is a direct consequence of the momentum dependence of the d-wave superconducting gap. When the magnetic correlation length becomes large, the dispersion should become magnon-like, i.e., curve upwards from (pi,pi).

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Andrey V. Chubukov, Boldizsar Janko, Oleg Tchernyshyov. 2000-12-11. Dispersion of the neutron resonance in cuprate superconductors. https://doi.org/10.1103/physrevb.63.180507

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