Dispersion of the neutron resonance in cuprate superconductors

Andrey V. Chubukov, Boldizsár Jankó, Oleg Tchernyshyov

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38 Scopus citations

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 magnonlike, i.e., curve upwards from (π, π).

Original languageEnglish (US)
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume63
Issue number18
DOIs
StatePublished - Apr 11 2001

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