In the realm of two-dimensional materials magnetic and transport properties of a unique representative − Fe3GeTe2− attract ever increasing attention. Here, we use a developed first-principles method for calculating laser-induced response to study the emergence of photo-induced currents of charge and spin in single-layer Fe3GeTe2, which are of second order in the electric field. We provide a symmetry analysis of the emergent photocurrents in the system finding it to be in excellent agreement with ab-initio calculations. We analyse the magnitude and behavior of the charge photocurrents with respect to disorder strength, frequency and band filling. Remarkably, not only do we find a large charge current response, but also predict that Fe3GeTe2 can serve as a source of significant laser-induced spin-currents, which makes this material as a promising platform for various applications in optospintronics.
@article{arxiv.2109.10192,
title = {Photocurrents of charge and spin in single-layer Fe$_3$GeTe$_2$},
author = {M. Merte and F. Freimuth and T. Adamantopoulos and D. Go and T. G. Saunderson and M. Kläui and L. Plucinski and O. Gomonay and S. Blügel and Y. Mokrousov},
journal= {arXiv preprint arXiv:2109.10192},
year = {2021}
}