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Proposal for topological insulator realized with piezoelectric resonators

Topological Insulators (TI) have been the subject of intense research by condensed matter physicists over the last decade for many reasons. One of which is the existence of helical edge modes, which can occur even when wave propagation through the bulk of the material is impossible. Eager to engineer devices that support these helical modes, researchers have invented classical systems analogous to the quantum mechanical TI. However, the path to miniaturization for most of these systems for practical devices is not always clear. Here, I propose a classical TI which can be realized with piezoelectric resonators. By using piezoelectric resonators, one may take advantage of the high linearity, compact design, and established micro-fabrication techniques.