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

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 usin...

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Bibliographic Details
Published in:arXiv.org 2020-01
Main Authors: Cheng, Shujie, Yin, Honghao, Lu, Zhanpeng, He, Chaocheng, Wang, Pei, Gao Xianlong
Format: Article
Language:English
Subjects:
Atomic properties
Energy spectra
Phases
Quantum Hall effect
Topology
Online Access:Get full text
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.2001.10842