Journal
NATIONAL SCIENCE REVIEW
Volume 8, Issue 7, Pages -Publisher
OXFORD UNIV PRESS
DOI: 10.1093/nsr/nwaa192
Keywords
topological circuits; Weyl points; surface states; band structure
Categories
Funding
- National Natural Science Foundation of China (NSFC) [61625502, 11961141010, 61975176]
- Top-Notch Young Talents Program of China
- Fundamental Research Funds for the Central Universities
- Fundamental Research Funds for the Central Universities [3072019CFJ2504]
- National Natural Science Foundation of China [61901133, 61675054, 91750107, U1931121]
- 111 Project [B13015]
- Natural Science Foundation of Heilongjiang Province in China [ZD2018015]
- Singapore Ministry of Education [MOE2015-T2-1-070, MOE2015-T2-2-008, MOE2016-T3-1-006, Tier 1 RG174/16 (S)]
Ask authors/readers for more resources
In this study, a topological circuit with only four ideal type-II Weyl points was experimentally realized by stacking layers of inductor-capacitor resonators with broken parity inversion symmetry. This system provides an ideal platform for further research on Weyl physics and other exotic topological phenomena, due to its unique spectral characteristics and topological surface states.
Weyl points (WPs), nodal degenerate points in three-dimensional (3D) momentum space, are said to be 'ideal' if they are symmetry-related and well-separated, and reside at the same energy and far from nontopological bands. Although type-II WPs have unique spectral characteristics compared with type-I counterparts, ideal type-II WPs have not yet been reported because of a lack of an experimental platform with enough flexibility to produce strongly tilted dispersion bands. Here, we experimentally realize a topological circuit that hosts only topological bands with a minimal number of four ideal type-II WPs. By stacking two-dimensional (2D) layers of inductor-capacitor (LC) resonator dimers with the broken parity inversion symmetry (P), we achieve a strongly tilted band structure with two group velocities in the same direction, and topological surface states in an incomplete bandgap. Our results establish an ideal system for the further study of Weyl physics and other exotic topological phenomena.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available