Experimental observation of boundary flat bands with topological spin textures
The spin polarization of a boundary flat band (BFB) protected by chiral symmetry is typically fixed. The authors experimentally demonstrate here the realization of BFBs with momentum-dependent spin polarizations, exhibiting nontrivial topological windings across the boundary Brillouin zone in a circuit system. The so-called subchiral symmetry is the key symmetry responsible for the emergence of these additional topological properties. These findings establish BFBs as a promising new platform for exploring flat-band physics.
Authors
- Rui Yu (ORCID: https://orcid.org/0000-0002-6633-2337)
- Yuanchuan Biao (ORCID: https://orcid.org/0000-0001-6882-1065)
- Zhongbo Yan (ORCID: https://orcid.org/0000-0002-8973-2173)
Institutions
- Sun Yat-sen University (CN)
- Wuhan University (CN)
- Wuhan Institute of Technology (CN)
Publication Details
- Journal
- Physical review. B./Physical review. B
- Published
- 2024-12-24
- DOI
- https://doi.org/10.1103/physrevb.110.l241110
- Citations
- 3
- Primary Topic
- Magnetic properties of thin films
- Type
- article
- Field-Weighted Citation Impact
- 1.01
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Guangdong Province
- Basic and Applied Basic Research Foundation of Guangdong Province