Unusual Two-stage Dynamics of the Spin-Lattice Polaron Formation
Strongly Correlated Electrons
2015-01-27 v1
Abstract
We follow the formation of a spin-lattice polaron after a quantum quench that simulates absorption of the pump{pulse in the time-resolved experiments. We discover a two-stage relaxation where spin and lattice degrees of freedom represent an integral part of the relaxation mechanism. In the first stage the kinetic energy of the spin-lattice polaron relaxes towards its ground state value while relaxation processes via spin and phonon degrees of freedom remain roughly independent. In the second, typically much longer stage, a subsequent energy transfer between lattice and spin degrees of freedom via the charge carrier emerges. The excess local spin energy radiates away via magnon excitations.
Keywords
Cite
@article{arxiv.1402.6104,
title = {Unusual Two-stage Dynamics of the Spin-Lattice Polaron Formation},
author = {Jan Kogoj and Zala Lenarcic and Denis Golez and Marcin Mierzejewski and Peter Prelovsek and Janez Bonca},
journal= {arXiv preprint arXiv:1402.6104},
year = {2015}
}