The physical realization of pseudomagnetic fields (PMFs) is an engaging frontier of research. As in graphene, elastic PMF can be realized by the structural modulations of Dirac materials. We show that, in the presence of PMFs, the conical dispersions split into elastic Landau levels, and the elastic modes robustly propagate along the edges, similar to the quantum Hall edge transports. In particular, we reveal unique elastic snake states in an on-chip heterostructure with two opposite PMFs. The flexibility in the micromanufacture of silicon chips and the low loss of elastic waves provide an unprecedented opportunity to demonstrate various fascinating topological transports of the edge states under PMFs. These properties open new possibilities for designing functional elastic wave devices in miniature and compact scales.

中文翻译：

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伪磁场能够操纵片上弹性波

伪磁场 (PMF) 的物理实现是一个引人入胜的研究前沿。与石墨烯一样，弹性 PMF 可以通过 Dirac 材料的结构调制来实现。我们表明，在 PMF 存在的情况下，锥形色散分裂成弹性朗道能级，并且弹性模式沿着边缘稳健地传播，类似于量子霍尔边缘传输。特别是，我们揭示了具有两个相反 PMF 的片上异质结构中独特的弹性蛇形状态。硅芯片微制造的灵活性和弹性波的低损耗为展示 PMF 下边缘态的各种迷人拓扑传输提供了前所未有的机会。这些特性为设计微型和紧凑尺度的功能性弹性波装置开辟了新的可能性。