Floquet topological phases with time-reversal and space inversion symmetries and dynamical detection of topological charges

• URL: http://arxiv.org/abs/2406.08532v1
• Date: Wed, 12 Jun 2024 13:10:30 GMT
• Title: Floquet topological phases with time-reversal and space inversion symmetries and dynamical detection of topological charges
• Authors: Hong Wu, Yu-Chen Dong, Hui Liu,
• Abstract summary: It is possible to have strong topological insulator, second-order topological insulator and hybrid-order topological insulator in a single four band system. This study provides the theoretical basis for novel topological insulator that possess hybrid-order boundary states beyond the conventional regimes.
• Score: 6.360473053262561
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: For spinful systems with spin 1/2, it is generally believed that P and T invariant strong and second-order topologies exist in four band and eight band system, respectively. Here, by using periodic driving, we find it is possible to have strong topological insulator, second-order topological insulator and hybrid-order topological insulator in a single four band system. Furthermore, we established a direct connection between topology and dynamics. More convenient experimental detection for these topological phases has also been proposed. This study provides the theoretical basis for novel topological insulator that possess hybrid-order boundary states beyond the conventional regimes.

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