Low-energy Effective Theory for Spin Dynamics of Fluctuating Stripes
Superconductivity
2007-05-23 v1 Strongly Correlated Electrons
Abstract
We derive an effective Hamiltonian for spin dynamics of fluctuating smectic stripes from the t-J model in the weak coupling limit t >> J. Besides the modulation of spin magnitude, the high energy hopping term would induce a low-energy anti-ferromagnetic interaction between two neighboring ``blocks of spins". Based on the effective Hamiltonian, we applied the linear spin-wave theory and found that the spin-wave velocity is almost isotropic for La_{2-x}Sr_x CuO_4 unless the structural effect is considered. The intensity of the second harmonic mode is found to be about 10% to that of the fundamental mode.
Keywords
Cite
@article{arxiv.cond-mat/0510529,
title = {Low-energy Effective Theory for Spin Dynamics of Fluctuating Stripes},
author = {Chi-Ho Cheng},
journal= {arXiv preprint arXiv:cond-mat/0510529},
year = {2007}
}
Comments
4 pages, 2 figures