Dispersion of the neutron resonance in cuprate superconductors

Andrey V. Chubukov; Boldizsár Jankó; Oleg Tchernyshyov

doi:10.1103/PhysRevB.63.180507

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Dispersion of the neutron resonance in cuprate superconductors

Andrey V. Chubukov, Boldizsár Jankó, Oleg Tchernyshyov

DOI 10.1103/PhysRevB.63.180507 · Physical Review B

T1

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

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown