Nature Communications

Fractal hierarchy enables exponential scaling of topological boundary states

• Limin Song
• Zhichan Hu
• Ziteng Wang
• Domenico Bongiovanni
• Liqin Tang
• Daohong Song
• Roberto Morandotti
• Jingjun Xu
• Hrvoje Buljan
• Zhigang Chen

2026-07-09

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DOI https://doi.org/10.1038/s41467-026-75412-y