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arXiv 1711.02433cond-mat.mes-hallcond-mat.mtrl-scicond-mat.softphysics.app-ph
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陀螺晶格中拓扑相变的实现

Realization of a Topological Phase Transition in a Gyroscopic Lattice

Noah P. Mitchell, Lisa M. Nash, William T. M. Irvine

摘要:

拓扑超材料在它们的边界处表现出不寻常的行为,例如单向手征波,其受到它们的能带结构的拓扑特征的保护。通过拓扑相变实时调整这种材料的能力可以使保护波用于信息存储和读出。在这里,我们动态地调整通过拓扑相变打破反转对称性的超材料组成的相互作用的陀螺仪。通过跃迁,我们跟踪了边缘模局域长度的发散和表征材料能带结构拓扑的陈数的变化。这项工作提供了一个新的轴,调整机械拓扑超材料的响应。

英文摘要:

Topological metamaterials exhibit unusual behaviors at their boundaries, such as unidirectional chiral waves, that are protected by a topological feature of their band structure. The ability to tune such a material through a topological phase transition in real time could enable the use of protected waves for information storage and readout. Here we dynamically tune through a topological phase transition by breaking inversion symmetry in a metamaterial composed of interacting gyroscopes. Through the transition, we track the divergence of the edge modes' localization length and the change in Chern number characterizing the topology of the material's band structure. This work provides a new axis with which to tune the response of mechanical topological metamaterials.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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