Topological insulators (TIs) constitute a unique class of quantum materials owing to their topology-protected electron states. While pressure is an effective way to induce superconductivity in TIs, superconductivity often appears after phase transition or structural disorder. Therefore, identifying systems in which superconductivity emerges at relatively low-pressure regions within a well-defined topological structure is desirable. In this work, it was demonstrated that ${\mathrm{PbBi}}_6{\mathrm{Te}}_{10}$ undergoes two structural transitions from $R\text{−}3m$ to $C2/m$ and subsequently to disordered $Im\text{−}3m$ structure under high pressure. Superconductivity emerged at 0.9 GPa and reached a maximum transition temperature of 8.8 K at 4.2 GPa within the initial structural phase, forming a dome-shaped phase diagram. First-principles calculations revealed that the bands remained topologically nontrivial under 4.0 GPa. These results establish ${\mathrm{PbBi}}_6{\mathrm{Te}}_{10}$ as a platform for exploring the interplay between pressure-induced superconductivity and nontrivial topological states.

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• Phase transitions
• Pressure effects
• Superconductivity
• Transport phenomena