Two-Dimensionality of Magnetic Excitations on the Trellis Lattice: (La,Sr,Ca)$_{14}$Cu$_{24}$O$_{41}$ and SrCu$_2$O$_3$

Details Two-Dimensionality of Magnetic Excitations on the Trellis Lattice: (La,Sr,Ca)$_{14}$Cu$_{24}$O$_{41}$ and SrCu$_2$O$_3$ Two-Dimensionality of Magnetic Excitations on the Trellis Lattice: (La,Sr,Ca)$_{14}$Cu$_{24}$O$_{41}$ and SrCu$_2$O$_3$

2007-01-23

arxiv.org/abs/cond-mat/0701551v2

Phys. Rev. B 75, 224414 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 7 figures, predictions to inelastic neutron experiments; slightly revised version according to the referees' suggesti

Scientific paper

10.1103/PhysRevB.75.224414

We explore the properties of magnetic excitations on the trellis lattice which is relevant for the so-called telephone-number compounds A$_{14}$Cu$_{24}$O$_{41}$ and the system SrCu$_2$O$_3$. The trellis lattice consists of two-leg ladders which are coupled in a strongly frustrated fashion. We use the effective model obtained for a single two-leg spin ladder to calculate the two-dimensional one-triplon dispersion and the corresponding one-triplon contribution to the dynamical structure factor. Special attention is laid on signatures of the frustrating inter-ladder magnetic exchange. A detailed suggestion is made for an experimental detection of this exchange in inelastic neutron scattering experiments.

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