With respect to the quantum anomalous Hall effect (QAHE), the detection of topological nontrivial large-Chern-number phases is an intriguing subject. Motivated by recent research on Floquet topological phases, this study proposes a periodic driving protocol to engineer large-Chern-number phases using QAHE. Herein, spinless ultracold fermionic atoms are studied in a two-dimensional optical dice lattice with nearest-neighbor hopping and a Λ/V-type sublattice potential subjected to a circular driving force. Results suggest that large-Chern-number phases exist with Chern numbers equal to C=−2, which is consistent with the edge-state energy spectra.
@article{arxiv.2001.10842,
title = {Predicting Large-Chern-Number Phases in a Shaken Optical Dice Lattice},
author = {Shujie Cheng and Honghao Yin and Zhanpeng Lu and Chaocheng He and Pei Wang and Gao Xianlong},
journal= {arXiv preprint arXiv:2001.10842},
year = {2020}
}