Unifying Magnons and Triplons in Stripe-Ordered Cuprate Superconductors

G. S. Uhrig; K. P. Schmidt; M. Grüninger

doi:10.1103/PhysRevLett.93.267003

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Unifying Magnons and Triplons in Stripe-Ordered Cuprate Superconductors

G. S. Uhrig, K. P. Schmidt, M. Grüninger

DOI 10.1103/PhysRevLett.93.267003 · Physical Review Letters

T1

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Abstract

Based on a two-dimensional model of coupled two-leg spin ladders, we derive a unified picture of recent neutron scattering data of stripe-ordered La15/8Ba1/8CuO4, namely, of the low-energy magnons around the superstructure satellites and of the triplon excitations at higher energies. The resonance peak at the antiferromagnetic wave vector QAF in the stripe-ordered phase corresponds to a saddle point in the dispersion of the magnetic excitations. Quantitative agreement with the neutron data is obtained for J=130–160 meV and Jcyc/J=0.2–0.25.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La15/8Ba1/8CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown