Magnetic excitations in the stripe phase of high-Tc superconductors
G. S. Uhrig, K. P. Schmidt, M. Grüninger
Abstract
The magnetic excitations in the stripe phase of high-Tc superconductors are investigated in a model of spin ladders which are effectively coupled via charged stripes. Starting from the effective single-triplon model for the isolated spin ladder, the quasi-one-dimensional spin system can be described straightforwardly. Very good agreement is obtained with recent neutron scattering data on La(15/8)Ba(1/8)CuO4 (no spin gap) and YBa2Cu3O(6.6) (gapped). The signature of quasi-one-dimensional spin physics in a single-domain stripe phase is predicted.
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