We consider the spin-1/2 isotropic XY chain in a (z) transverse magnetic field with the Dzyaloshinskii-Moriya interaction directed along the z-axis in spin space and examine the effects of the latter interaction on the zz, xx (yy) and xy (yx) dynamic structure factors. The Dzyaloshinskii-Moriya interaction does not manifest itself in the zz dynamic quantities. In contrast, the xx (yy) and xy (yx) dynamic structure factors show dramatical changes owing to the Dzyaloshinskii-Moriya interaction. Implications of our results for electron spin resonance experiments are briefly discussed.
@article{arxiv.0712.2507,
title = {Dynamic structure factors of the spin-1/2 XX chain with Dzyaloshinskii-Moriya interaction},
author = {Oleg Derzhko and Taras Verkholyak},
journal= {arXiv preprint arXiv:0712.2507},
year = {2007}
}