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Spin dynamics in the antiferromagnetic phase for electron-doped cuprate superconductors

Qingshan Yuan·T. K. Lee·C. S. Ting
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Abstract

Based on the $t$-$t'$-$t''$-$J$ model we have calculated the dynamical spin susceptibilities in the antiferromagnetic (AF) phase for electron-doped cuprates, by use of the slave-boson mean-field theory and random phase approximation. Various results for the susceptibilities versus energy and momentum have been shown at different dopings. At low energy, except the collective spin-wave mode around $(π,π)$ and 0, we have primarily observed that new resonance peaks will appear around $(0.3π,0.7π)$ and equivalent points with increasing doping, which are due to the particle-hole excitations between the two AF bands. The peaks are pronounced in the transverse susceptibility but not in the longitudinal one. These features are predicted for neutron scattering measurements.

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Qingshan Yuan, T. K. Lee, C. S. Ting. 2005-05-04. Spin dynamics in the antiferromagnetic phase for electron-doped cuprate superconductors. https://doi.org/10.1103/physrevb.71.134522

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