Layered transition metal chalcogenides are promising hosts of electronic Weyl nodes and topological superconductivity. MoTe₂ is a striking example that harbors both noncentrosymmetric T_d and centrosymmetric T’ phases, both of which have been identified as topologically nontrivial. Applied pressure tunes the structural transition separating these phases to zero temperature, stabilizing a mixed T_d–T’ matrix that entails a network of interfaces between the two nontrivial topological phases. Here, we show that this critical pressure range is characterized by distinct coherent quantum oscillations, indicating that the difference in topology between topologically nonvtrivial T_d and T’ phases gives rise to an emergent electronic structure: a network of topological interfaces. A rare combination of topologically nontrivial electronic structures and locked-in transformation barriers leads to this counterintuitive situation, wherein quantum oscillations can be observed in a structurally inhomogeneous material. These results further open the possibility of stabilizing multiple topological phases coexisting with superconductivity.

层状过渡金属硫族化物是有希望的电子Weyl节点和拓扑超导宿主。MoTe ₂是一个引人注目的例子，既包含非中心对称的T _d相，又包含中心对称的T'相，这两个相均已被确定为拓扑上无关紧要的。施加的压力调整了将这些相分离到零温度的结构转变，稳定了混合的T _d -T'矩阵，该矩阵包含两个非平凡的拓扑相之间的界面网络。在这里，我们表明该临界压力范围的特征在于明显的相干量子振荡，这表明拓扑非重要T _d之间的拓扑差异T'相和T'相产生了新兴的电子结构：拓扑接口网络。拓扑无关紧要的电子结构和锁定的转换壁垒的罕见组合会导致这种反直觉的情况，其中可以在结构不均匀的材料中观察到量子振荡。这些结果进一步打开了稳定与超导性共存的多个拓扑相的可能性。