High-Harmonic Generation in a Correlated Electron System
Abstract
High-harmonic generation (HHG) in crystalline solids have been examined so far on the basis of one-body energy-band structures arising from electron itineracy in a periodic potential. Here, we show emergence of HHG signals which are attributed to dynamics of many-body states in a low-dimensional correlated electron system. An interacting fermion model and its effective pseudo-spin model on a one-dimensional dimer-type lattice are analyzed. Observed HHG signals in a spontaneously symmetry-broken state, where charge densities are polarized inside of dimer units, show threshold behavior with respect to light amplitude and are interpreted in terms of tunneling and recombination of kink-antikink excitations in an electric field.
Cite
@article{arxiv.1907.05687,
title = {High-Harmonic Generation in a Correlated Electron System},
author = {Shohei Imai and Atsushi Ono and Sumio Ishihara},
journal= {arXiv preprint arXiv:1907.05687},
year = {2020}
}
Comments
8 pages, 9 figures (including supplemental material)