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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2602.04591 |
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| _version_ | 1866915774102241280 |
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| author | Lemkalli, Brahim Ji, Qingxiang Zhang, Jingyi Craster, Richard Christensen, Johan Kadic, Muamer |
| author_facet | Lemkalli, Brahim Ji, Qingxiang Zhang, Jingyi Craster, Richard Christensen, Johan Kadic, Muamer |
| contents | Nonlinear mechanical metamaterials can exhibit emergent transport phenomena that mimic topological protection without relying on linear band topology. Here, we realize a bifurcation-induced nonreciprocal lattice that supports robust propagation of elastic kink waves. Each unit is a prestrained, hinged-beam circulator that develops angular momentum bias during snap-through transitions between buckling states, producing an effective breaking of time reversal symmetry. Coupling such units into a hexagonal array yields a mechanically chiral network where localized soliton-like excitations propagate unidirectionally along interfaces and edges, immune to sharp bends. We demonstrate non-dispersive kink transport governed by a SineGordon type field whose effective bias encodes mechanical chirality. This framework bridges bifurcation dynamics and nonreciprocal transport, establishing a nonlinear route toward topological like mechanical functionality without magnetic or gyroscopic bias. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_04591 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Nonreciprocal topological kink-wave propagation in mechanical metamaterials Lemkalli, Brahim Ji, Qingxiang Zhang, Jingyi Craster, Richard Christensen, Johan Kadic, Muamer Materials Science Nonlinear mechanical metamaterials can exhibit emergent transport phenomena that mimic topological protection without relying on linear band topology. Here, we realize a bifurcation-induced nonreciprocal lattice that supports robust propagation of elastic kink waves. Each unit is a prestrained, hinged-beam circulator that develops angular momentum bias during snap-through transitions between buckling states, producing an effective breaking of time reversal symmetry. Coupling such units into a hexagonal array yields a mechanically chiral network where localized soliton-like excitations propagate unidirectionally along interfaces and edges, immune to sharp bends. We demonstrate non-dispersive kink transport governed by a SineGordon type field whose effective bias encodes mechanical chirality. This framework bridges bifurcation dynamics and nonreciprocal transport, establishing a nonlinear route toward topological like mechanical functionality without magnetic or gyroscopic bias. |
| title | Nonreciprocal topological kink-wave propagation in mechanical metamaterials |
| topic | Materials Science |
| url | https://arxiv.org/abs/2602.04591 |