Predicting Large-Chern-Number Phases in a Shaken Optical Dice Lattice

• URL: http://arxiv.org/abs/2001.10842v1
• Date: Wed, 29 Jan 2020 13:59:04 GMT
• Title: Predicting Large-Chern-Number Phases in a Shaken Optical Dice Lattice
• Authors: Shujie Cheng, Honghao Yin, Zhanpeng Lu, Chaocheng He, Pei Wang, and Gao Xianlong
• Abstract summary: This study proposes a periodic driving protocol to engineer large-Chern-number phases. Results suggest that large-Chern-number phases exist with Chern numbers equal to $C=-2$, which is consistent with the edge-state energy spectra.
• Score: 5.837572754969576
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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 $\Lambda$/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.

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