Subharmonic oscillations in the Floquet circuit with the frequency-synthesis dimension
The period-doubling oscillation emerges due to the coexistence of zero and π modes in Floquet topological insulators (FTIs). Here, leveraging the flexibility of the electric circuit, we construct a circuit with frequency-synthetic dimension to realize the FTIs of a periodically-driven model and demonstrate the topological edge states of zero and π modes. In contrast to the period-doubling oscillations observed in FTIs, the circuit exhibits deeply-subharmonic oscillations with periods extensively exceeding the doubling-driven period. Furthermore, we explore the band of the circuit with the equivalent-enhanced periodically-driven strength. Our method provides a flexible scheme to study Floquet topological phases, and open a new path for realizing the deeply subwavelength system.
Authors
- Sijie Wang (ORCID: https://orcid.org/0000-0003-0716-8220)
- Huibin Tao
- Zheng Zhu (ORCID: https://orcid.org/0000-0001-5233-8220)
- Ting Liu (ORCID: https://orcid.org/0009-0001-6813-4801)
- Ye Tian
- Hongyang Mu
- Bo Lv (ORCID: https://orcid.org/0000-0001-9807-6633)
- Jinhui Shi
- Meng Fan-yi
- Shiyun Xia
- Zhichao Shen
Institutions
- Harbin Engineering University (CN)
- Harbin Institute of Technology (CN)
- Nanjing University of Science and Technology (CN)
- Heilongjiang Institute of Technology (CN)
- Xi'an Jiaotong University (CN)
Publication Details
- Journal
- Reviews in Physics
- Published
- 2025-01-29
- DOI
- https://doi.org/10.1016/j.revip.2025.100105
- Primary Topic
- Topological Materials and Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Heilongjiang Province
- Fundamental Research Funds for the Central Universities
- Fundamental Research Funds for Central Universities of the Central South University